digging dog nursery mendocino coast   garden perennials from digging dog nursery

Perennials at Digging Dog
Tanacetum to Zauschneria

Including Thalictrum, Thymus, Tricyrtus, Trillium, Veronica, Verbascum, & Yucca

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Tanacetum

Tansy

Tanacetum vulgare ‘Isla Gold’ full sun  partial shade
Golden Tansy

Be careful! Legend tells us that this herb, mixed into salad, helped married couples conceive! With deeply incised, yellow-green foliage, ‘Isla Gold’ is a blithe light in the garden border, holding its bright color and form throughout the summer. Shear off yellow flower clusters to prolong the gilded display. Its carefree, open demeanor provides a delicately feathered backdrop for the dramatically dark leaves of Heuchera ‘Obsidian’.

Blooms July – August.

Size: 2-1/2'–3' 0" high x 3' 0" wide; hardy to zone 5.


Tanacetum vulgare ‘Isla Gold’ (P-0868)
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Teucrium


Teucrium hircanicum ‘Paradise Delight’ full sun  partial shade <i>Teucrium hircanicum</i> ‘Paradise Delight’

Held in playful repose—some straight, some slightly bent—the long, animal-like floral tails host tightly set jade-green buds. Upon opening, copious Veronica-style spikes entice us with lavish purple-red shades. Touting a more compact habit, improved branching and aromatic sage-green textured foliage, this new and bushy, clump-forming perennial forges a welcome sight in any border, or it can be pruned for an attractive, out-of the-ordinary hedge.

Blooms August–October.

Size: 16"–20" high x 18" wide; hardy to zone 6.


Teucrium hircanicum ‘Paradise Delight’ (P-1408)
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Teucrium hyrcanicum ‘Purple Tails’ full sun

Held in playful repose—some straight, some slightly bent—the long, animal-like floral tails host tightly set jade green buds. Upon opening, copious Veronica-style spikes entice us with lavish deep fuchsia-purple shades.

Native to the Caucasus Mountains and Iran, this bushy, clump-forming perennial, with its aromatic sage-green textured foliage, forges a welcome sight in any border, or it can be pruned for an attractive, out-of the-ordinary hedge.

Blooms July–October.

Size: 18"–2' 0" high x 20" wide; hardy to zone 6.


Teucrium hyrcanicum ‘Purple Tails’ (P-1324)
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AVAILABLE AUGUST 2017

Thalictrum

Meadow-Rue

Once upon a time, the newborn infant was placed upon a pillow filled with Meadow-Rue to ensure a prosperous life. Thalictrum means “to flourish,” and it does, with elegant foamlike sprays that resemble Baby’s Breath, and rounded, finely cut, compound foliage. Tougher than it appears, Thalictrum is the perfect choice for the border.


Thalictrum ‘Ankum’ full sun  partial shade

Showing amazing vigor, this exceptional Thalictrum was twice as large as the other delavayi seedlings when esteemed Dutch plantsman, Coen Jansen initially spotted it growing in a propagation tray. Glaucous bluish green Columbine-like foliage drapes the sky-high sleek dark stalks that energetically thrust upward, supporting large soft-hued effervescent puffs of plenteous lilac pink flowers with pronounced creamy yellow stamens on finely branched stems. A regal stand-alone for any garden, ‘Ankum’s hearty amber-colored spent stems maintain an exquisite presence long after its lovely blooms and leaves have faded.

Blooms July–August.

Size: 6-1/2' high x 2' 0" wide; hardy to zone 5.


Thalictrum ‘Ankum’ (P-1777)
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Thalictrum aquilegifolium ‘Thundercloud’ full sun  partial shade

The tallest of the species and one of the showiest Meadow-Rues, this aptly named Thalictrum amasses large fluffy heads defined by pronounced rich rosy violet stamens and dark purple double florets. The colorful individual flowers unfurl like tiny fireworks, imparting a gracious glamour atop branched stems and small teal green obovate leaflets. An honored AGM recipient, 'Thundercloud' is best planted en masse against a dark backdrop.

Blooms July–August.

Size: 3' 0"–4' 0" high x 12" wide; hardy to zone 5.


Thalictrum aquilegifolium ‘Thundercloud’ (P-1822)
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Thalictrum delavayi ‘Album’ full sun  partial shade

Distinctive for its gauzy white flowers with pale yellow stamens gracing sizable branched sprays, this classy clump-forming Thalictrum is grounded by finely divided fresh green Columbine-like foliage. 'Album's delicate upright silhouette provides peerless texture-rich accents that effectively contrast bold-leafed plants such as Hydrangea serrata 'Kiyosumi' in the mixed border.

Blooms July – August.

Size: 3-1/2' high x 12" wide; hardy to zone 5.


Thalictrum delavayi ‘Album’ (P-0435)
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Thalictrum delavayi ‘Hewitt’s Double’ full sun  partial shade <i>Thalictrum delavayi</i> ‘Hewitt’s Double’

Pale purple double flowers with yellow eyes adorn this Thalictrum’s tall flower stems. We often grow ‘Hewitt’s Double’ among other plants, such as Anemone x hybrida ‘Andrea Atkinson’, for support, especially in areas exposed to summer wind and rain.

Blooms August–September.

Size: 4' 0"–6' 0" high x 3' 0" wide; hardy to zone 5.


Thalictrum delavayi ‘Hewitt’s Double’ (P-0139)
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Thalictrum ‘Elin’ full sun  partial shade
<i>Thalictrum</i> ‘Elin’

Loosely garbed in striking steely blue foliage, ‘Elin’s tall purple-tinged stems maintain a stately carriage. An impressive hybrid between Thalictrum flavum var. glaucum and Thalictrum rochebrunianum, its sturdy upright stalks culminate in open sprays of bicolored pale yellow and lavender flowers. Known to grow up to 12 ft. tall, this lofty Thalictrum paints soft smoky hues in the background and seldom needs staking.

Blooms July–early August.

Size: 8' 0" high x 2' 0" wide; hardy to zone 5.


Thalictrum ‘Elin’ (P-1145)
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Thalictrum flavum ssp. glaucum full sun  partial shade

You will never “rue” planting this winning European native. As it emerges in spring, tender mauve-tinted stems and foliage scramble skyward. By midsummer, gleaming and glaucous trilobed, silvery blue-green foliage adorns brawny upright stems. Erect, gossamer-like panicles of soft yellow burst upward in a frothy show.

Absolutely striking when planted in a drift with Phlomis russeliana and Spodiopogon sibiricus.

Blooms July–August.

Size: 5' 0"–6' 0" high x 2' 0" wide; hardy to zone 5.


Thalictrum flavum ssp. glaucum (P-1146)
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Thalictrum rochebrunianum full sun  partial shade

A marvelous perennial that fashions an ethereal, lavender-hued mist, this elegant Japanese native boasts attractive foliage and a bounteous display of dainty flowers. Tall stems hold glabrous, blue-green, oval-shaped leaves, and each produces wiry branched blooming panicles. Prominent pale yellow stamens and persistent sepals accentuate the display. Most effective in a drift, place wherever a glow of purple would be welcome.

Blooms August–September.

Size: 5' 0" high x 2' 0" wide; hardy to zone 5.


Thalictrum rochebrunianum (P-0970)
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AVAILABLE OCTOBER 2017

Thalictrum ‘Splendide’ full sun  partial shade

Discovered as a garden seedling between Thalictrum elegans and Thalictrum delavayi by celebrated French Heuchera breeder, Thierry Delabroye, this towering floriferous Meadow Rue is indeed splendid. Heaven bound and steadfast, 9 ft. tall, crimson tinted stalks, clothed with lacy grayish green fernlike foliage, have a willowy architectural appeal.

Myriad lavender-pink flowers, centered by cream-colored stamens, compose a massive, yet sprightly pastel cloud, which envelopes the entire upper 3 ft. of each impressive plant nearly all summer long.

Blooms late June – September.

Size: 5' 0"–9' 0" high x 2' 0" wide; hardy to zone 3.


Thalictrum ‘Splendide’ (P-1676)
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Thalictrum ‘Splendide White’ full sun  partial shade  new plant

Kudos to renowned French nurseryman Thierry Delabroye for this urbane white blooming Meadow Rue. Erect multibranched hale-and-hearty stalks support pinnate leaves with oblong grayish green leaflets, plus large gossamer-like panicles of small spherical buds unfurling fragrant snowy white blooms. Aptly named, ‘Splendide White’s tall growing visage has splendor to spare that can be enjoyed midborder, planted either en masse or positioned as a spectacular illuminated specimen, or cut for a fanciful bouquet.

Blooms late June–September

Size: 3' 0"–4' 0" high x 12" wide; hardy to zone 4.


Thalictrum ‘Splendide White’ (P-1953)
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Thymus

Thyme

“I know a bank where the wild thyme blows,” says Oberon to Puck in A Midsummer Night’s Dream. Upright or creeping, these aromatic culinary herbs form luscious mats of ground cover or sprite-sized shrubs, embellished with miniature flowers in whites, purples and pinks. In the herb garden, or around and between stepping stones or bricks, Thymes love sun and well drained soil, and can even tolerate a dose of wind and salt spray.


Thymus ‘Doone Valley’ full sun
<i>Thymus</i> ‘Doone Valley’

This low spreading, evergreen Thyme has a lot to offer: golden variegated foliage, colorful flowers, and a tangy lemon aroma. Brimming with tiny pinkish purple blooms, the 3 to 4 in. long, flowering clusters enhance the gilt-edged, deep green leaves, which are especially bright-hued in the cool of spring. Creeping near Hebe ‘Champagne’, ‘Doone Valley’ makes a captivating, small-space ground cover.

Blooms August–October.

Size: 5" high x 18" & spreading; hardy to zone 5.


Thymus ‘Doone Valley’ (P-1200)
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AVAILABLE FALL 2017


Thymus ‘Latavin Lucy’ full sun  drought tolerant

Hailing from Latavin, this topnotch, rarely offered cultivar is the perfect choice for nestling between stepping stones. Resilient, deep green pint-sized leaves cavort close to the ground forming lustrous mats spangled with a slew of miniature, rosy purple blooms.

Blooms June – July.

Size: 3" high x 18"–2' 0" wide; hardy to zone 5.


Thymus ‘Latavin Lucy’ (P-1467)
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Thymus leuchotrichus full sun

Dwelling in Turkey’s Amanos Mountains, this distinctive softly colored Thyme houses pale stems and short, stiff needlelike leaves. The low, aromatic grey-green mound is fine textured, semievergreen and well branched, and garnished with clusters of miniature rosy pink flowers, making it a natural for a trough, the rockery or a Thyme-inspired tapestry.

Blooms June – July.

Size: 8" high x 12" wide; hardy to zone 7.


Thymus leuchotrichus (P-1544)
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Thymus neiceffii full sun
Juniper Thyme

Distinctive gray Juniper-style foliage makes this hard-to-find Thyme unique among other species in the genus. Stubby needle-shaped aromatic leaves tightly cling to reddish brown stems that lay flat on the ground, bearing bee friendly mauve-pink blooms in spring. Awash with soft pastel shades, Juniper Thyme can be threaded between pavers plus draped over rock work or container edges.

Blooms May-June

Size: 1"–2" high x 8"–10" wide; hardy to zone 4.


Thymus neiceffii (P-1859)
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Thymus pannonicus full sun

Small pink flowers ascend a thimble’s length or two above a soft looking, broad mound of fine textured, almost needlelike foliage.

Blooms June – August.

Size: 4" high x 15" wide; hardy to zone 4.


Thymus pannonicus (P-0140)
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AVAILABLE FALL 2017

Thymus ‘Pink Chintz’ full sun
Mother Of Thyme
<i>Thymus</i> ‘Pink Chintz’

Dressed up with a fresh pink blanket of bloom and a delicate texture, ‘Pink Chintz’ is one of the first Thymes to flower. Obscured by its colorful cover, this vigorous ground hugger’s small grayish green leaves are strongly scented, close-knit and fuzzy. Try tucking Mother of Thyme in the rockery alongside Stachys ‘Silky Fleece’ and Dracocephalum ‘Blue Dragon’ for a detailed association.

Blooms May–July.

Size: 1"–2" high x 18" wide; hardy to zone 5.


Thymus ‘Pink Chintz’ (P-1286)
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Thymus praecox ssp. arcticus ‘Albus’ full sun
White Creeping Thyme
<i>Thymus praecox</i> ssp. <i>arcticus</i> ‘Albus’

An elfin-sized army of bright green rounded leaves and wiry thin, straw-colored stems weaves a low-lying springy mat. Whether nestled into nooks or stowed amid pavers, the attractive evergreen foliage gets a refreshing lift when petite white flowers form a thick summertime icing.

Blooms July – August.

Size: 2' 0" high x 12" wide; hardy to zone 5.


Thymus praecox ssp. arcticus ‘Albus’ (P-1543)
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AVAILABLE AUGUST 2017


Thymus praecox ‘Pseudolanuginosus’ full sun
Woolly Thyme

Woolly, Tom Thumb-like and cozy-looking, the aromatic silver-green leaves form a tight nearly prostate mat tough enough to handle foot traffic. This versatile pink flowering Thyme can creep between steps and patio stones or cushion hard edges in the garden, as well as spice up culinary dishes and impart medicinal properties.

Blooms May – June.

Size: 1"–2" high x 10"–12" wide. Zone 3/4.


Thymus praecox ‘Pseudolanuginosus’ (P-1623)
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Thymus pulegioides ‘Archer’s Gold’ full sun

Illuminated by gold-splashed green leaves, this bushy aromatic Thyme sculpts low evergreen billows that soften our steps. Droves of lighthearted lavender-pink flowers and neighbors like Saponaria and Silene ‘Compacta’ heighten the composition.

Blooms June–July.

Size: 6" high x 12" wide. Zone 6/7.


Thymus pulegioides ‘Archer’s Gold’ (P-1409)
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Thymus quinquecostatus full sun
<i>Thymus quinquecostatus</i>

Even though its name doesn’t impart visions of beauty, we promise you’ll be smitten with this showy Asian Thyme. Highly fragrant dark green leaves and wire-thin creeping stems weave a dense verdant mat. Prolific, ample-sized rosy pink flowers festoon foliage that can soften your pavers, flavor your dinner or be utilized medicinally to fight cancer and infections.

Blooms July – August.

Size: 4" high x 12"–2' 0" wide; hardy to zone 5.


Thymus quinquecostatus (P-1718)
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Thymus ‘Rose Williams’ full sun

Exuding a spicy scent, this dense evergreen shrublet sports pretty whorls of diminutive lavender pink flowers amid grayish green needle-thin leaves. ‘Rose Williams’s natty low mounding habit makes an undemanding water wise addition to pathways, herb gardens and Mediterranean plantings.

Blooms May-June

Size: 12" high x 2' 0" wide; hardy to zone 6.


Thymus ‘Rose Williams’ (P-1860)
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Thymus serpyllum ‘Doretta Klaber’ full sun

Snugly weaving one of the tightest growing forms in the genus, minute fuzzy green leaves define each textural ground-hugging hummock that celebrates deep lavender pink summertime flowers and cold weather mahogany shades. This choice, easily maintained dwarf thyme brings refined looking ground-level greenery to a trough, stone wall or staircase.

Blooms May–June.

Size: 2" high x 12" wide; hardy to zone 4.


Thymus serpyllum ‘Doretta Klaber’ (P-1821)
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Thymus serpyllum ‘Minor’ full sun
<i>Thymus serpyllum</i> ‘Minor’

Teensie-tiny miniature leaves comprise a snug carpet-like hummock that’s small in size, but big on charm. Remarkably rugged, the fuzzy, gray-green overlapping foliage belies its diminutive appearance, enduring some foot traffic and hot dry conditions. Pretty lavender-pink elfin flowers peek out from the fine textured soft-looking clump as it slowly mantles a staircase, the rockery or a Tom Thumb-like container planting.

Blooms July – August.

Size: 1"–3" high x 12" wide; hardy to zone 4.


Thymus serpyllum ‘Minor’ (P-0141)
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AVAILABLE SUMMER 2017


Thymus serpyllum ‘Victor Reiter’ full sun

Rosy pink flowers peer above this mat of semi-evergreen, fragrant, rich kelly green foliage. Noted collector Victor Reiter brought this one back to northern California from the Mediterranean. We use it liberally to fill crevices or cascade over walls.

Blooms June–July.

Size: 2"–6" high x 2' 0" wide; hardy to zone 6.


Thymus serpyllum ‘Victor Reiter’ (P-0142)
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Thymus vulgaris ‘Passion Pink’ full sun

Saluted as both a culinary delight and a winsome garden addition, this pint-sized evergreen shrublet gives you plenty to be passionate about. Rounded shiny dark green leaves shape a compact upright habit that’s garnished with good-sized clusters of look-at-me bright pink flowers. Ideal nestled into the rockery, herb garden or topping a stone wall, ‘Passion Pink’s tidy mien responds well to shearing, requires little care and can accompany Silene ‘Compacta’ or Allium ‘Blue Eddy’.

Blooms June–July

Size: 12" high x 12" wide; hardy to zone 5.


Thymus vulgaris ‘Passion Pink’ (P-1898)
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Tiarella

Foam Flower

This easy-to-grow, clump-forming evergreen is one of the finest spring flowering woodland perennials.


Tiarella ‘Pink Skyrocket’ partial shade
<i>Tiarella</i> ‘Pink Skyrocket’

‘Pink Skyrocket’, a Terra Nova introduction, is one of the best pink flowering cultivars in the genus. Dissected Maple-like leaves, engraved with dark chocolate central blotches, shape a lush shiny green mound. “Skyrocketing” on tall sturdy stems, large, perfect-for-cutting spires are studded with round rosy buds and frothy pink and white star-shaped flowers. En masse, as an understory or along the border, this easy-to-grow, clump-forming evergreen works well skirting Viburnum, the Sichuan Deutzia and Sambucus. (pp#13382)

Blooms March – May.

Size: 12" high x 12" wide; hardy to zone 4.


Tiarella ‘Pink Skyrocket’ (P-1468)
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Trachystemon


Trachystemon orientalis full sun  partial shade  shade lover
Oriental Trachystemon
<i>Trachystemon orientalis</i>

Looking for a bold toughie to beautify that problem area in your garden? Trachystemon orientalis may be your answer.

Whether the spot is sunny or shady, dry or moist, or over rough terrain, this Borage family member will rapidly fill it in with a thick, weed-smothering cover of handsome, coarse textured dark green leaves—hairy, immense, many up to a foot long, and heart-shaped—attached to long petioles. Heralding spring, starry blue, white-throated flowers carried on branched hairy pink stems are reminiscent of Dodecatheon blooms and make their appearance before the wavy-edged foliage bursts forth in late spring.

Its native haunts are Bulgaria and northern Turkey, and here in our garden it intermingles with Anthriscus ‘Ravenswing’ and Euphorbia ‘Great Dixter’, creating a dynamic array of foliar colors and textures.

Blooms March.

Size: 18" high x 2' 0" & spreading; hardy to zone 6.


Trachystemon orientalis (P-1356)
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AVAILABLE MID SEPTEMBER 2017


Tricyrtis

Toad Lily

Some say this fascinating species owes its common name to the Philippine Tasaday Indians’ practice of wiping their hands with juice from the blossoms before setting out to collect frogs. Others say it’s the unusual spotted flowers that account for the name.

Whichever story is true, the blooms have such detail and quiet beauty that they should be admired close-up. They open on gently arching stems for long periods in late summer and early fall, when most other flowers are already spent. With a moist, humus-rich soil, all the Toad Lilies will form elegant clumps.


Tricyrtis ‘Blue Wonder’ partial shade  shade lover

A jewel of the shadows, velvet-smooth lily-like flowers are defined by pronounced violet anthers and creamy white and powder blue petals dramatically splashed with bluish purple flecks. Compact gently arching stems and ovate emerald green leaves forge a stylish vase-shaped base for rounded maroon buds and exotic-looking late season flowers. Inheriting hirta and formosana ancestry, ‘Blue Wonder’ needs to be ensconced along a path where its amazing detail can be easily relished.

Blooms September – October.

Size: 18"–2' 0" high x 12"–15" wide; hardy to zone 5.


Tricyrtis ‘Blue Wonder’ (P-1719)
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Tricyrtis ‘Empress’ partial shade  shade lover
<i>Tricyrtis</i> ‘Empress’

Renowned for its extra large and wider open flowers, this exquisite, newly introduced Toad Lily is a formosana hybrid. Ornate, spidery spaced petals are inscribed by occasional darkened tips and irregular velvet-rich deep purple spots, stipples and mottling on a creamy white background. An enticing fall beacon amongst the shadows, ‘Empress’s showy terminal blooms are supported by an upright robust gathering of lustrous, semi-clasping dark green foliage that stays dapper all season.

Blooms August – September.

Size: 2-1/4' high x 18" wide; hardy to zone 5.


Tricyrtis ‘Empress’ (P-1469)
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Tricyrtis formosana ‘Samurai’ partial shade  shade lover
<i>Tricyrtis formosana</i> ‘Samurai’

Smaller in stature than the other Tricyrtis cultivars we offer, the wine-colored upright stems of this garden “warrior” are a striking complement to its light green leaves. A further touch of light is achieved by the irregularly variegated, creamy leaf margins. Orchid-like purple flowers have dark plum speckles, and gold and white highlights at their centers. Skirt it with Epimedium ‘Lilafee’.

Blooms August–September.

Size: 16" high x 18" wide; hardy to zone 5.


Tricyrtis formosana ‘Samurai’ (P-0143)
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Tricyrtis ‘Hatatogisa’ partial shade  shade lover
<i>Tricyrtis</i> ‘Hatatogisa’

These purple-spotted, dark dusty blue flowers with white centers evoke images of early night skies sprinkled with stars. The dark green foliage is also spotted, and combines with deep purple buds to give this spectacular Tricyrtis long lasting appeal. Plant with Kirengeshoma and double the intrigue of the flowers and foliage.

Blooms September–October.

Size: 2' 0" high x 18" wide; hardy to zone 5.


Tricyrtis ‘Hatatogisa’ (P-0423)
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Tricyrtis hirta ‘Moonlight’ partial shade  shade lover
<i>Tricyrtis hirta</i> ‘Moonlight’

Attired in neon-bright chartreuse foliage, this hirta ‘Variegata’ sport is a shining beacon for any shady spot that needs some oomph. Arching stems feature arresting, purple flecked white flowers that heighten the illuminated composition.

Introduced by Bluebird Nursery, ‘Moonlight’ maintains its refreshing, well-groomed look throughout the season.

Blooms September–October.

Size: 20" high x 18"–2' 0" wide; hardy to zone 5.


Tricyrtis hirta ‘Moonlight’ (P-1355)
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Tricyrtis lasiocarpa partial shade
Amethyst Toad Lily

A favored standout among Tricyrtis, this exceptional species sprouts an attractive tightset clump of sturdy erect arching stems garbed with glistening green and purple freckled alternating leaves. Amethyst and blue petal tips embellish white upward facing orchid-style blooms that populate large well-branched terminal sprays. Hailing from Taiwan, where it has been observed growing in nearly full sun, Amethyst Toad Lily’s lovely long blooming flowers can model their ornate features in a brighter garden bed.

Blooms August–September.

Size: 3' 0" high x 18" wide; hardy to zone 7.


Tricyrtis lasiocarpa (P-0271)
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Tricyrtis x ‘Sinonome’ partial shade  shade lover
<i>Tricyrtis</i> x ‘Sinonome’

Long esteemed in Japan for its elegant cut flowers, ‘Sinonome’ presents a pleasing vase-shaped clump of upright stems lined with lustrous, clean-looking dark green foliage. Emerging from buds the color of chocolate, white, upfacing blooms show off richly colored ruby freckles. One of the more heat and drought tolerant Toadlilies, this Tricyrtis could be planted next to Aster divaricatus.

Blooms September–October.

Size: 2' 0"–3' 0" high x 2' 0" wide; hardy to zone 5.


Tricyrtis x ‘Sinonome’ (P-1228)
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Trifolium

Clover


Trifolium rubens full sun
Red Feather Clover

Denoting good luck, this easily cultivated perennial legume is quite ornamental. Bushy, upright clumps of signature tripetaled, medium green leaves, give rise to huge silvery buds, which open to become bright crimson candles of bloom. Borne on long stems, the soft flowers come in droves, and are choice for drawing bees, butterflies and hummingbirds. Create a stylized meadow by planting it amongst Lupinus ‘The Governor’ and Pennisetum ‘Hameln’.

Blooms July–August.

Size: 2' 0" high x 18" wide; hardy to zone 5.


Trifolium rubens (P-1198)
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Trillium

Wood Lily

A sure sign that spring has settled in, these demure treasures are at home in cool woodland settings. Soon after their enchanting flowers fade, the handsome foliage disappears as well. Trilliums are long-lived, prefer humus-rich soil with ample moisture, and make admirable companions for Asarum, Toad Lilies, and ferns.


Trillium albidum partial shade  shade lover
Sweet Trillium
<i>Trillium albidum</i>

Hobnobbing in moist sites from San Francisco to southern Oregon, this native is robust and showy. Large subtly fragrant pearl white flowers are perched atop a dark green cushion of dappled, wavy edged spring foliage that rises on tall, often multiple, stems. In early summer, prominent purple berries keep our interest sparked.

Blooms mid-March – late April.

Size: 16" high x 10"–12" wide; hardy to zone 6.


Trillium albidum (P-1622)
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Trillium catesbaei partial shade  shade lover
Catesby’s Trillium

This seldom offered woodland beauty grows wild throughout the southeastern regions of our country in dry oak and pine woodlands. Borne singularly atop an erect stem, each dainty nodding 1 ½ in. bloom features three unique sickle-shaped petals flushed with soft pink to darker rosy hues, punctuated by prominent golden yellow anthers, twisting in an irregular outward fashion. A purple-tinged green stem supports three handsome green whorled leaves, which don lustrous surfaces and upright elliptical outlines sharply tapering to pointed tips

Blooms April–May

Size: 12"–18" high x 10"–12" wide; hardy to zone 4.


Trillium catesbaei (P-1778)
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Trillium grandiflorum ‘Snowy White’ partial shade  shade lover
White Wake Robin

The quintessential native woodland plant, ‘Snowy White’ promises a sparkling display of pure white, three-petaled flowers. Wavy-edged, curved back at the tips and blushing a rosy hue as they wane, the regal blooms garnish attractive green foliage that easily carpets a cool, shady spot.

Blooms March–May.

Size: 12"–18" high x 10"–12" wide; hardy to zone 4.


Trillium grandiflorum ‘Snowy White’ (P-0885)
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Trillium luteum partial shade  shade lover
Yellow Wake Robin

The broad foliage of this species is marbled with light green and yellow, echoing the colors of the showy flower. Ours is planted under a Myrica californica with Helleborus x hybridus and Asarum caudatum.

Blooms April–early June.

Size: 12" high x 12" wide; hardy to zone 5.


Trillium luteum (P-0559)
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Trillium sessile partial shade  shade lover
<i>Trillium sessile</i>

Its common name belies the simple elegance of this rarely offered Missouri woodlander. Three evenly spaced broad leaves forge a handsome platform for 2 in. high maroon blooms, which are mottled in shades of green, purple and white. Defined by 3 erect petals, the unique stalkless flowers gracefully embellish a clump-forming base, whose thick underground rhizomes will slowly colonize if left undisturbed.

Blooms April – May.

Size: 6"–12" high x 6"–12" wide; hardy to zone 4.


Trillium sessile (P-0681)
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Trollius

Globeflower

Gracing gardens since the 16th century, these marvelous yellow-hued blooms inspired their name, which translates to “basin” in Latin or “globe” in German. Globeflowers are undemanding perennials that look best en masse and are the perfect choice for the waters’ edge, a boggy spot, or the border, given a moisture retentive, organic-rich soil and shelter from hot sun.

A sterling addition to bouquets, the Buttercup-like blossoms perch on straight stems above handsome, deeply divided glossy leaves and promise a long summer fling with regular deadheading.


Trollius ‘Alabaster’ full sun  partial shade

Reminiscent of Mother-of-Pearl or King Tut’s alabaster vessels, the light creamy white color that imbues these large blooms brings a quiet elegance to the garden. Layered chiffonlike petals embellish stylish cup-shaped flowers, while below deeply chiseled, green glabrous foliage grows into an attractive, moisture-loving basal clump.

Developed by George Arends some sixty years ago, this exquisite cultorum hybrid can be intermingled with the chartreuse sprays of Alchemilla mollis ‘Auslese’.

Blooms early June – mid-July.

Size: 2' 0" high x 18" wide; hardy to zone 4.


Trollius ‘Alabaster’ (P-1673)
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Trollius chinensis ‘Golden Queen’ full sun  partial shade
<i>Trollius chinensis</i> ‘Golden Queen’

Bearing a crown of 12 or more narrow vertical petals surrounded by an outer ring of cupped soft orange sepals, this Trollius is known as the “Queen of the Buttercups.” Gleaming dark green leaves—serrated, toothed and finely cut—meld a vigorous basal clump that launches the sturdy 3 ft. tall flowering stems in no need of staking.

Blooms June–July.

Size: 2' 0"–2-1/2' high x 18" wide; hardy to zone 4.


Trollius chinensis ‘Golden Queen’ (P-1410)
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Trollius x cultorum ‘Cheddar’ full sun  partial shade
<i>Trollius</i> x <i>cultorum</i> ‘Cheddar’

Pale yellow, tissue-like petals fashion an exquisite, nearly double, shallow open cup. Casting a soft feminine mood on the May garden, the sumptuous blooms pose above an attractive mound of shiny foliage carved into small sections. A Dutch introduction, ‘Cheddar’ deserves to find its way into more gardens, where it will flourish in damp open sites matched with companions such as Sanguisorba obtusa or Geranium ‘Espresso’ .

Blooms June–July.

Size: 2' 0" high x 18" wide; hardy to zone 4.


Trollius x cultorum ‘Cheddar’ (P-1411)
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Trollius x cultorum ‘Lemon Queen’ full sun  partial shade

Steeped in old-world allure, the gleaming flush of lusty deep green lobed foliage coronates large double lemon yellow globes. A 1920s selection that shares lineage with Trollius europaeus, Trollius asiaticus and Trollius chinensis, this hybrid's splendid chiffon-like flowers alight tall sleek stalks, flaunting showy stamens and a composed beauty. 'Lemon Queen' demands cool moist soil and easily rules a woodland's edge with confidants such as Astilbe 'Perkeo' and low growing Anemones.

Blooms June–July.

Size: 2-1/4' high x 18" wide; hardy to zone 4.


Trollius x cultorum ‘Lemon Queen’ (P-0487)
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Trollius europaeus ‘Superbus’ full sun  partial shade

Distinguished by overlapping, incurved petals bathed in cool lemon-yellows, beautiful globes gracefully alight foot long olive-green stems. A polished foliar mass grounds the bounteous one to two in. blooms. Maintaining a fresh look even when exposed to drier conditions, the large richly green leaves are rounded and divided into 5 parts with each lobed leaflet emargined by prominent teeth.

Blooms June–July.

Size: 2' 0" high x 18" wide; hardy to zone 4.


Trollius europaeus ‘Superbus’ (P-1412)
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Uvularia

Merrybells

Uvularia grandiflora partial shade  shade lover

With subtle grace, this moisture-loving woodland dweller unveils exquisitely dainty, moonlit yellow blooms. Its slender rhizomes send up a colony of wiry, erect branching stalks alternately wrapped in smooth, fresh green oblong foliage without petioles. From the upper leaf nodes on arched stem tips, 6 twisted lanceolate petals define narrowly bell-shaped blooms that enact a merry, dangling dance.

A Solomon’s Seal relation native to central and eastern America, Merrybells easily enchants any open, shady haunt given humus-rich soil, mulch and companions like Disporum ‘Heronswood Night’ and Ajuga ‘Chocolate Chip’.

Blooms March–April.

Size: 12" high x 9" wide; hardy to zone 3.


Uvularia grandiflora (P-1413)
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Verbascum

Verbascum

Mullein

This genus has a host of common names, including ‘Beggar’s Blanket’ and ‘Old Man’s Flannel’. In England, the very poor used to put the thick leaves into their shoes for warmth. It is also said that when fish eat the seeds, they are stupefied and can be gathered by hand.

Although most of the more than 300 species are biennials, our offerings are perennials. Though some are dwarfs and some are giants, nearly all have fuzzy stamens and prefer very well drained sandy or rocky soil. We like to use them in the rock garden as specimens or for naturalizing.


Verbascum chaixii ‘Sixteen Candles’ full sun

Grounded by gray-green rosettes, these upstanding candelabras of copious, violet-eyed, sunshine-hued flowers stage a truly incandescent spectacle. Irregular scallops, net-veining and long petioles define its dynamic large basal leaves. Preferring a somewhat dry, well drained site, ‘Sixteen Candles’s proud yellow spires command attention alongside Nepeta reichenbachiana.

Blooms June–August.

Size: 3-1/4' high x 2' 0" wide; hardy to zone 5.


Verbascum chaixii ‘Sixteen Candles’ (P-1287)
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Verbascum chaixii ‘Wedding Candles’ full sun

Illuminated tapers stage droves of tightly set pure white flowers centered by fuzzy purple filaments and bright orange anthers. The flat-faced blooms shine above pearly green textured leaves.

Conveying a bright floral lift all summer long, this undemanding perennial can be sited in drier garden areas with Perovskia abrotanoides or Phygelius ‘Snow Queen’.

Blooms June–August.

Size: 3' 0"–3-1/2' high x 18" wide; hardy to zone 5.


Verbascum chaixii ‘Wedding Candles’ (P-1417)
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Verbascum ‘Clementine’ full sun
<i>Verbascum</i> ‘Clementine’

When British plant breeders, Vic Johnstone and Claire Wilson, developed more than a thousand hybrids utilizing various wild Verbascum species, they chose only the best dozen seedlings and dubbed them ‘The Riverside Hybrids’; this splendid toasty hued prodigy was one of them. Sprouting from handsome rippled green basal leaves, numerous, well-branched straight stems bolster burgundy flushed button-like buds on tall floral spikes.

Large and luscious, wide-open coppery orange flowers, festooned with a central cluster of woolly light violet filaments, lend warm vertical accents to Allium ‘Gladiator’.

Blooms July – August.

Size: 4' 0"–5' 0" high x 2' 0" wide; hardy to zone 5.


Verbascum ‘Clementine’ (P-1677)
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Verbascum ‘Gainsborough’ full sun
<i>Verbascum</i> ‘Gainsborough’

This Verbascum’s hushed colors are soothing to the senses and easy to blend with other perennials. Centered by delicate orange stamens, the cupped, dusky primrose yellow flowers and cream-colored buds squeeze onto numerous branched candelabra-style spires. Downy gray leaves converge at the base of the statuesque presentation, while Echinops ‘Arctic Glow’s snow white spheres make a pleasing counterpoint.

Blooms July – August.

Size: 4' 0"–4-1/2' high x 18" wide; hardy to zone 5.


Verbascum ‘Gainsborough’ (P-1556)
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Verbascum hybridum ‘Wega’ full sun
Banana Custard Mullein

A felted biennial rosette of ample, grayish green ripple-edged foliage unleashes spectacular 6 ft. tall luminous flowering stalks. The crowded, blunt-tipped stout stems house fuzzy, round silver buds and large saucer-shaped blossoms bathed in soft custard yellow hues with orange anthers. These long blooming, multibranched beauties are some of the last flowers to grace our mixed border, delivering glowing vertical accents ‘til October’s end.

Blooms July–October.

Size: 6' 0" high x 2' 0" wide; hardy to zone 6.


Verbascum hybridum ‘Wega’ (P-1416)
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Verbascum nigrum ‘Album’ full sun
<i>Verbascum nigrum</i> ‘Album’

With flower spikes reaching over 3-½ ft. tall, ‘Album’ is truly dramatic. Its many white flowers are tinged with crimson at the base of each petal and accented by golden orange stamens. The large basal leaves are coarse, deep green and textured. Their undulating margins, and often their stems, are tinted a deep burgundy color.

Blooms July–August.

Size: 4' 0" high x 18" wide; hardy to zone 5.


Verbascum nigrum ‘Album’ (P-0320)
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Verbascum olympicum full sun
Candlewick

A remarkable perennial of Olympian proportions, Candlewick originates in Europe’s Bithynian Mountains. Large, felted, wavy-edged leaves form a huge, silvery basal rosette that lasts through the winter. In summer, woolly “candles” branch out at the base, and soar skyward with cheerful clusters of bright yellow flowers. Outstanding as a feature plant in a shrubby Mediterranean border, this monumental Mullein appreciates a dry spot.

Blooms July–September.

Size: 6' 0"–8' 0" high x 2' 0"–3' 0" wide; hardy to zone 7.


Verbascum olympicum (P-0973)
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Verbascum phoeniceum ‘Flush of White’ full sun
<i>Verbascum phoeniceum</i> ‘Flush of White’

Attired in pure white, the slender flowering spikes show off an abundance of frosty, yellow-eyed blooms. This illuminated display arises from ripple-edged green foliage, which achieves a tidy, compact rosette. ‘Flush of White’s uniform snowy coloring is unusual for a Verbascum, while its smaller stance becomes an added bonus where space is limited.

Blooms May.

Size: 2' 0"–2-1/2' high x 18" wide; hardy to zone 6.


Verbascum phoeniceum ‘Flush of White’ (P-1288)
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Verbascum phoeniceum ‘Rosetta’ full sun
<i>Verbascum phoeniceum</i> ‘Rosetta’

'Rosetta' puts on a colorful flower display, bejeweled in pretty carmine-pink hues. Anchored by comely, crimpled dark green leaves, the tall spires host sumptuously hued, gold-centered, saucer-shaped flowers that celebrate the vivid hues of Phygelius ‘New Sensation’ and Liatris ‘Floristan Violett’.

Blooms May–August.

Size: 2' 0"–2-1/2' high x 18" wide; hardy to zone 6.


Verbascum phoeniceum ‘Rosetta’ (P-1229)
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Verbascum phoeniceum ‘Violetta’ full sun
Purple Mullein
<i>Verbascum phoeniceum</i> ‘Violetta’

As a precursor to the royal floral show of this delicate Mullein, enchanting buds swell, resembling tiny, dark satin pillows. A deep green, flat rosette of oval-shaped, crinkled leaves provides an attractive base for the airy and richly colored flowering spikes. Brightened by gilt stamens, papery purple blooms are flat-faced and look fabulous in arrangements. Self-seeding easily, and shorter in stature than most Verbascums, ‘Violetta’ is perfect for the smaller garden.

Blooms May–August.

Size: 2' 0"–3' 0" high x 18" wide; hardy to zone 6.


Verbascum phoeniceum ‘Violetta’ (P-0972)
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Verbascum ‘Pink Domino’ full sun
<i>Verbascum</i> ‘Pink Domino’

Romantic shades of rose-pink dress up these dark-eyed saucer-shaped blooms. Standing straight and tall, the lovely spikes rise from a rich green, purple-streaked, ripply rosette. Sprinkle among Monarda ‘Violet Queen’ and Eryngium ‘Blue Jackpot’ for divergent flower forms and an unrivaled feminine touch.

Blooms June – August.

Size: 4' 0"–4-1/2' high x 18" wide; hardy to zone 5.


Verbascum ‘Pink Domino’ (P-1557)
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Verbascum ‘White Domino’ full sun

A stately stand of tall branched racemes laden with large, white cupped blooms distinguishes this new Verbascum cultivar. Fuzzy basal foliage, steeped in soft grayish greens, launches the crisp and classic display that shows a lively touch of color when reddish purple floral filaments appear.

Blooms June – August.

Size: 3-1/4'–4' 0" high x 18" wide; hardy to zone 5.


Verbascum ‘White Domino’ (P-1621)
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Verbena

Vervain

Our noteworthy offerings from this diverse genus feature captivating cool-colored summer-time flowers, coarsely toothed hairy foliage and tall 4-angled stems. Easily grown in average garden soil, they will delight you with months of bloom and a lighthearted presence.


Verbena bonariensis full sun
Brazilian Vervain
<i>Verbena bonariensis</i>

A celebrated perennial whose fans include both experienced gardeners and novices, and florists and hummingbirds, this versatile South American native delivers outstanding flower power. Rough, lance-shaped dark green basal foliage gives way to wiry and sparsely leafed angular-branching stems, which elevate a consortium of tiny lavender violet blooms.

With fragrant flowers borne in dense tufts atop its airy profile, Brazilian Vervain brings a colorful carefree look to cottage gardens or more wild venues, especially when paired with ornamental grasses.

Blooms June – October.

Size: 3' 0"–6' 0" high x 18" wide; hardy to zone 7.


Verbena bonariensis (P-1720)
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Verbena hastata full sun
Blue Vervain

This vigorous North American native grows upright and develops a dense, broad crown after a few seasons. The effect is almost candelabralike, with tiny blue-violet flowers and purple bracts opening in an upward-moving whorl along branching flower spikes. The vibrant glow of the flowers reflects the deep purple stems and brightens the dark green pointed foliage. For an interesting blend of forms, plant this Vervain with Rodgersias and Helianthus hirsutus.

Blooms July–September.

Size: 4' 0" high x 18" wide; hardy to zone 4.


Verbena hastata (P-0424)
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AVAILABLE SPRING 2018

Verbena hastata ‘Blue Spires’ full sun
Blue Vervain

This vigorous North American native grows upright, developing a dense, broad crown after a few seasons. The effect is almost candelabra-like, with tiny blue-violet blooms and deep purple bracts opening in an upward-moving whorl along branching flower spikes. The vibrant bicolored glow of the blossoms reflects the deep purple stems and brightens the pointed dark green opposite foliage.

For an arresting blend of forms, plant this Vervain with Helianthus ‘Gold Lace’ and Sesleria ‘Greenlee’.

Blooms June – October.

Size: 3' 0"–4' 0" high x 18"–2' 0" wide; hardy to zone 4.


Verbena hastata ‘Blue Spires’ (P-1721)
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Verbena hastata ‘Pink Spires’ full sun

Vividly colored flowers and darker pink buds are housed on well-branched slender spires of small pink blooms opening from the bottom up. The pretty floral parade rides straight-backed, tall steadfast stems clothed in opposite, pointy dark green lax leaves, creating a dynamic juxtaposition between the untaut foliage and the plant’s stiff upright stature. ‘Pink Spires’ promises nonstop blooms all summer long, injects height into your border, never needs staking and makes a stellar cut flower.

Blooms June–October.

Size: 3' 0"–4' 0" high x 18"–2' 0" wide; hardy to zone 4.


Verbena hastata ‘Pink Spires’ (P-1779)
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Vernonia

   


Vernonia crinita full sun
Ironweed

A robust presence, unsurpassed late fall color and a compelling winter silhouette are this North American prairie dweller’s claim to fame. Painted with opulent crimson-purple hues, the flat branched heads of Aster-like flowers surmount proud stiff stems and long lance-shaped, rough-to-the touch green leaves. A finale of fluffy white seed heads matures to a rusty orange, earning its common name, while the genus pays tribute to William Vernon, a British botanist who collected the species in Maryland in 1698.

Clump-forming Ironweed is well-suited for a modern meadow-style theme, holding its own amongst bold, green bladed Miscanthus or more airy Molinia or tall perennials like Helianthus ‘Lemon Queen’ and Aconitum. Beloved by bees and butterflies everywhere, it’s easily cultivated, appreciating a well drained moderately moist site.

Blooms August – September.

Size: 5' 0" high x 12"–2' 0" wide; hardy to zone 5.


Vernonia crinita (P-0971)
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Vernonia fasciculata full sun
<i>Vernonia fasciculata</i>

Venerated for its iron-related traits including arrow-straight brawny stems, fluffy warm rust-tinged seed heads and a rugged constitution, this easily grown late bloomer roams the moist prairies from Ohio to North Dakota and south to Missouri, Oklahoma and Texas. Glabrous green linear leaves line smooth stalks, rendering a brilliant purple burst of densely clustered composite flowers that hosts the American Painted Lady butterfly. Its substantial hard-working presence can be featured in informal borders or meadow-style settings and ensconced with Sanguisorba 'Chocolate Tip', Eryngium yuccifolium and native grasses.

Blooms July–September

Size: 2' 0"–4' 0" high x 18"–3' 0" wide. Zone 3/4.


Vernonia fasciculata (P-1902)
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Vernonia lettermannii ‘Iron Butterfly’ full sun  new plant

We owe a round of applause to Dr. Allen Armitage for his University of Georgia plant trials, which produced this highly touted tasteful selection of Arkansas resident, Vernonia lettermannii. Distinguished by delicate looking thread-like green leaves, the robust, yet compact, attractively branched mounding habit affords small tubular bright purple blooms housed in showy terminal sprays. Possessing both a herculean mettle and ultra-fine texture, ‘Iron Butterfly’ demands free draining niches and extends seasonal interest with warm rusty toned autumn flower color plus triumphs over hot dry conditions as well as sandy, infertile rock-strewn sites.

Blooms August–September

Size: 2' 0"–3' 0" high x 18"–2' 0" wide; hardy to zone 4.


Vernonia lettermannii ‘Iron Butterfly’ (P-1954)
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Vernonia noveboracensis ‘White Lightening’ full sun  new plant
New York Ironweed

A flashy new 2014 Jelitto Seeds introduction, this undemanding white blooming version of the New York Ironweed propels erect upright stalks, densely cloaked in serrated lanceolate green leaves, buoying fluffy delicate plumes of narrow-petaled creamy white daisies. Followed by decorative seed heads, the long lasting late-season blooms entice many garden visitors, especially the bees and butterflies, and make bright additions to cut arrangements. ‘White Lightening’s bushy clumping habit readily adapts to variable conditions and can be massed or planted as a striking focal point for a more informal venue.

Blooms August–October

Size: 6' 0" high x 2-1/2' wide; hardy to zone 4.


Vernonia noveboracensis ‘White Lightening’ (P-1955)
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Veronica

Speedwell

According to legend, Saint Veronica used her handkerchief to soothe Christ’s brow, and forever after, it bore markings that are supposedly replicated in these long blooming Speedwell flowers. Flourishing in sunny, well drained sites, our Veronica selections are undemanding, and deliver dazzling color to the summer border.


Veronica incana ‘Pure Silver’ full sun  new plant
Silver Speedwell

Bees, butterflies and plant lovers arrive in droves to enjoy the tapering frosty tipped spires of tight-knit, vivid blue-violet flowers carried on branched leafy stems. Looking a bit like a Sage, the slender, toothed lance-shaped leaves create a dashing compact cool and silver mass that’s more tolerant of hot humid summers than other incana. An ideal low growing candidate for sharp draining borders, pathway edging, walls or rock gardens, ‘Pure Silver’ entrances companions such as Potentilla ‘Apricot Whisper’ and Agastache ‘Apricot Sprite’.

Blooms June–July

Size: 12"–2' 0" high x 8"–12" wide; hardy to zone 4.


Veronica incana ‘Pure Silver’ (P-1861)
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Veronica longifolia ‘Alba’ full sun

Strong erect stems elevate a refreshing floral display of tall, slender pure white columns crowded with small tubular blossoms that taper into curvy green tips. Beloved by bees, butterflies and flower arrangers, the sophisticated spires bloom for several months, and last in a vase for 7 to 10 days. This clump-forming hardy perennial dons toothed and pointed, lance-shaped leaves, lending a lush green presence to the rockery or mixed border, especially when planted in eye-catching drifts.

Blooms June – August.

Size: 3' 0" high x 15" wide; hardy to zone 4.


Veronica longifolia ‘Alba’ (P-1470)
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AVAILABLE LATE FALL 2017

Veronica longifolia ‘Marietta’ full sun

Recently awarded a bronze medal by the Boskoop Horticultural Society, this vibrant new introduction comes to our country courtesy of the acclaimed Dutch nursery, Rijnbeek. Slender toothed green leaves, which are less prone than most Veronica to mildew and leaf spot, compose a tidy basal bed beneath plentiful dark blue spires. The plump electric-hued inflorescences seem to glitter as fanciful looking, long light-colored stamens unfurl, setting ‘Marietta’ apart from its Veronica longifolia cousins.

Blooms June-July

Size: 2' 0" high x 2' 0" wide; hardy to zone 4.


Veronica longifolia ‘Marietta’ (P-1862)
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Veronica pectinata full sun
Blue Wooly Speedwell

All the way from Asia Minor’s sunny Mediterranean haunts comes this irresistible yet hard working evergreen ground cover. Offering up hordes of endearing bright blue, white-eyed blooms over a long period, this prostate Speedwell crafts a gray-green, matting carpet defined by light hairy stems and fuzzy deep cut foliage that looks a bit like miniature oak leaves.

Veronica pectinata is tailor-made for softening steps, rock walls or a path’s edge and is a cinch to grow, requiring only minimal water and a well drained nook.

Blooms July–mid-September.

Size: 2' 0"–4' 0" high x 12"–15" wide; hardy to zone 4.


Veronica pectinata (P-1418)
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Veronica porphyriana full sun

With vibrant blue-violet flower spires, a well-groomed low growing appearance and exceptional cold hardiness, this hard-to-find reliable Siberian beauty captivates gardeners and butterflies alike. A slowly creeping dense mat of compact, somewhat round-tipped and widely toothed forest green leaves supports electrifying blooms all summer long and makes a resilient nofuss contender for a well-drained rockery, pathway or trough garden.

Blooms June–September.

Size: 8"–12" high x 12" wide; hardy to zone 3.


Veronica porphyriana (P-1823)
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Veronica spicata ‘Royal Candles’ full sun
Spiked Speedwell

Plentiful and sumptuously colored, the dense, dark violet-blue tapers crown a compact, noninvasive base of glossy deep green foliage that stays fresh well into fall. Show off this perky new British cultivar right up front with Achillea ‘Marmalade’s cheerful yellow flowers.

Blooms June–July.

Size: 15"–18" high x 18" wide; hardy to zone 4.


Veronica spicata ‘Royal Candles’ (P-1151)
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Veronicastrum

Culver's Root

These elegant perennials impart a lofty vertical element to the late summer garden. Graced with distinctive narrow spires of densely arranged tiny flowers, Veronicastrum are native to meadows and woodlands, and are easy to grow in adequately moist soil.


Veronicastrum sibiricum full sun  partial shade

Studded with lavender blue blooms, the lengthy flower spikes make an elegant presentation. Arranged in groups, they stand proudly on upright, sturdy stems, which sport spaced whorls of neat, broadly lanceolate leaves. This noble Asian native offers an admirable contrast to mounding forms, such as Amsonia hubrichtii.

Blooms July–September.

Size: 5' 0" high x 18" wide; hardy to zone 4.


Veronicastrum sibiricum (P-0977)
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Veronicastrum sibiricum ‘Red Arrows’ full sun  partial shade

True to its name, this distinctive undemanding Coen Jansen introduction asserts deep rosy red buds squeezed onto a central spike, surrounded by slightly smaller side stalks all opening at the same time and presenting a unique arrow shape. Cherished by bees and butterflies, the striking spires unfurl a multitude of tiny violet flowers, while whorled lanceolate leaves attire tall steadfast stems. A glamourous upright mainstay for any planting, 'Red Arrows' soars amongst Trifolium rubens, Phlomis 'Amazon' and Sedum 'Matrona' in a prairie-style landscape or a more formal setting.

Blooms July – September.

Size: 4' 0" high x 18" wide; hardy to zone 4.


Veronicastrum sibiricum ‘Red Arrows’ (P-1824)
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Veronicastrum virginicum ‘Adoration’ full sun  partial shade

In addition to the stylish blooms, this sought-after Veronicastrum gives you good reason to adore it. When tall valiant stems stretch skyward, they strut striking purple shades easily spotted from a distance, which promise to turn more than a few heads. Round densely packed pink buds set the stage for ethereal-looking lilac flowers on candelabra-like spires, further enhancing the dashing whorls of deep green pointed leaves.

Blooms August – September.

Size: 4' 0"–5' 0" high x 2' 0" wide; hardy to zone 4.


Veronicastrum virginicum ‘Adoration’ (P-1722)
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Veronicastrum virginicum ‘Album’ full sun  partial shade
<i>Veronicastrum virginicum</i> ‘Album’

Resembling glowing tapers, erect snowy white racemes tipped with green buds make a crisp, classic statement. The luminous blooms hold court above whorls of horizontally set deep green foliage that grow at intervals along sturdy upstanding stems. Veronicastrum ‘Album’ commands our attention, while it sheds light on cohorts such as Geranium ‘Jolly Bee’ or Helianthus ‘Capenoch Star’.

Blooms August – October.

Size: 4' 0" high x 15" wide; hardy to zone 4.


Veronicastrum virginicum ‘Album’ (P-0144)
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Veronicastrum virginicum ‘Apollo’ full sun  partial shade

‘Apollo’s leafy stems taper delicately into foot-long lilac racemes tipped with vivid green buds, which bend and curve, adding a playful air to its imposing carriage. Display graceful ‘Apollo’ with Angelica archangelica’s rounded umbels, and the rosy plumes of Miscanthus ‘Nippon’.

Blooms August – September.

Size: 5' 0"–5-1/2' high x 2' 0" wide; hardy to zone 4.


Veronicastrum virginicum ‘Apollo’ (P-0869)
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Veronicastrum virginicum ‘Erica’ full sun  partial shade

‘Erica’s strong leafy stems taper delicately into long two-toned racemes of lavish red buds and small tightly packed pale pink flowers with prominent darker stamens. Opening from the base up, the slender wands bend and curve, adding a playful air to the impressive carriage below.

Display this graceful Veronicastrum with Selenium wallichianum’s white umbels, and the rosy plumes of Miscanthus ‘Positano’.

Blooms July–September.

Size: 3' 0"–4' 0" high x 15" wide; hardy to zone 4.


Veronicastrum virginicum ‘Erica’ (P-1414)
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Veronicastrum virginicum ‘Fascination’ full sun  partial shade

‘Fascination’s leafy stems taper delicately into 15 in. long lilac-rose racemes tipped with vivid green buds, which bend and curve, adding a playful air to its imposing carriage. Display this graceful Veronicastrum with Angelica archangelica’s rounded umbels, and the rosy plumes of Miscanthus ‘Nippon’.

Blooms August–September.

Size: 5' 0"–5-1/2' high x 2' 0" wide; hardy to zone 4.


Veronicastrum virginicum ‘Fascination’ (P-1230)
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Veronicastrum virginicum ‘Lavendelturm’ full sun  partial shade
<i>Veronicastrum virginicum</i> ‘Lavendelturm’

Coined Lavender Towers, this imposing Ernest Pagels introduction is aptly named. Straight-up stems garbed in handsome greenery—whorled, sharply toothed and pointed—give way to long branched spikes embellished with lovely pale purple flowers.

Blooms August – September.

Size: 4' 0"–5' 0" high x 2' 0" wide; hardy to zone 4.


Veronicastrum virginicum ‘Lavendelturm’ (P-1555)
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Viola

Violet

Hailing from the world’s temperate regions, these endearing hardy selections are reliably perennial. They prosper in bright shade with fertile, well-drained and evenly moist soil.


Viola ‘Black Magic’ full sun  partial shade

Touted as one of the darkest hued flowers in cultivation, this long blooming Viola will indeed work some magic wherever it’s planted. Each large, 1 in. wide edible flower possesses sumptuous jet black hues and a small sunny yellow eye that’s rimmed with violet above a compact, grassy green dainty-leafed clump. ‘Black Magic’s low growing heat tolerant habit promises oodles of blossoms throughout the cooler months, an autumn encore if trimmed back and renewed vigor following a September dividing.

Blooms May–September.

Size: 6"–8" high x 6"–8" wide; hardy to zone 5.


Viola ‘Black Magic’ (P-1780)
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Viola cornuta ‘Bowles Black’ full sun  partial shade
<i>Viola cornuta</i> ‘Bowles Black’

Violets have long been associated with faithfulness, and this delicate beauty holds true to her promise, blooming nonstop from spring until frost. Lifted on thin stems just above small, green scalloped leaves, the lavish display of dainty, midnight black flowers achieves a velvet luxury as deep purple accents surround golden eyes. Always appreciative of a good trimming, this compact Violet can be naturalized under a shrub, situated amid Alchemilla erythropoda by the patio or planted in a favored terracotta vessel.

Blooms May–September.

Size: 8" high x 12" wide; hardy to zone 7.


Viola cornuta ‘Bowles Black’ (P-1290)
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Viola ‘Rebecca’ full sun  partial shade
<i>Viola</i> ‘Rebecca’

‘Rebecca’ is treasured for her divine vanilla fragrance and tidy compact clumps of dapper evergreen foliage. All are equally captivating, though no two are alike, each ebullient white flower showcases a creamy lemon flushed center and irregularly patterned, deep violet edges. This sweet smelling Viola should be ensconced near a well-traveled path or seating area, where its plentiful color flecked flowers can be easily relished ‘till the first hard frost.

Blooms May – mid-October.

Size: 8"–10" high x 10"–15" wide; hardy to zone 5.


Viola ‘Rebecca’ (P-1674)
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Viola walteri ‘Silver Gem’ partial shade

Originating as a chance seedling in Bibb County, Alabama, and recently introduced by Delaware's Mt. Cuba Center, this dazzling nearly evergreen Viola lives up to its name. Prominent olive green veins and greenish purple reverses distinguish low growing heartshaped silvery leaves that clothe trailing stems and forge a no-nonsense dense mounded ground cover. Energetic, adaptable and drought tolerant once established, 'Silver Gem's dapper appearance is further festooned with a multitude of delicate purple flowers from spring until frost.

Blooms April–September.

Size: 3"–5" high x 8"–10" wide; hardy to zone 5.


Viola walteri ‘Silver Gem’ (P-1825)
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Wachendorfia

Wachendorfia thyrsiflora full sun  partial shade
Red Root
<i>Wachendorfia thyrsiflora</i>

Standing straight and bright green, the pleated all-season foliage forges a bold, sword-shaped presence for the back of the garden. Eye catching flower stems develop short side branches, each presenting several good-sized starry golden orange flowers with darker markings on their lower petals.

This long blooming South African native is easy to grow in moist heavy soils, and for a real surprise, dig down to see its otherworldly, dayglow orange roots.

Blooms May–August.

Size: 4' 0"–6' 0" high x 2' 0"–3' 0" wide. Zone 8/9.


Wachendorfia thyrsiflora (P-1419)
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Yucca

Yuccas can be found over much of North America, and the architectural assertiveness of their strong, swordlike blades is prized by gardeners. Each year, stout leafless stems bear large clusters of waxy, alabaster-colored floral pendants. Needing little or no maintenance and thriving best in well drained soil, these toughs will not complain where summers are hot or humid, or long and dry. Zone 5/6


Yucca dismetiana ‘Blue Boy’ full sun

Dressed in gray icy greens and powder blues with a dusky purple overlay, this handsome pastel-hued treasure exhibits a tough disposition. Rigid evergreen leaves with sharp pointed tips and fine-toothed margins craft a rounded barrel-like rosette that develops slowly, its amethyst coloration intensifying as the weather heats up. Waxy white pendulous flowers draped on stout panicles deliver late summer sparkle.

Unfazed by mettlesome deer, drought, moisture and humidity, ‘Blue Boy’ can harmonize with Melianthus ‘Antonow’s Blue’ and Festuca ‘Superba’.

Formerly listed as Yucca aloifolia ‘purpurea’.

Blooms July – August.

Size: 4' 0"–6' 0" high x 3' 0" wide. Zone 7/8.


Yucca dismetiana ‘Blue Boy’ (P-1495)
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Yucca filamentosa ‘Color Guard’ full sun
Adam's Needle
<i>Yucca filamentosa</i> ‘Color Guard’

Touted as one of the most attractive variegated Yuccas available, this Japanese cultivar's stiff spiky foliage comprises a mesmerizing close set, evergreen rosette. Achieving an added luster when long, curly white margin fibers seem to capture the moonlight, each spine-tipped leaf is etched by celadon green margins and a bold, creamy gold central stripe, which becomes brighter in mid summer. 'Color Guard's imposing silhouette can stand alone, be juxtaposed with Plectranthus 'Longwood Silver's soft felted foliage or be planted en masse.

Blooms June–July.

Size: 3' 0"–6' 0" high x 3' 0"–4' 0" wide; hardy to zone 5.


Yucca filamentosa ‘Color Guard’ (P-1781)
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Yucca rostrata ‘Sapphire Skies’ full sun
Blue-beaked Yucca

A beguiling sculptural rosette of powder blue, thin pointed blades, year-round good looks and exceptional hardiness is what this shrubby, fine textured Yucca has to offer. Relatively short, flexible leaves forge a luminous specimen well suited for a vessel or the dry garden.

Selected by Sean Hogan of Cistus Nursery from seed he collected in northern Mexico, it will eventually form an upright unbranched plant that prefers to bake in a hot sunny spot with sharp drainage and alkaline soil, while protection from excessive cold-season water and wind helps ensure a successful overwintering.

Blooms July – August.

Size: 4' 0" high x 3' 0" wide; hardy to zone 6.


Yucca rostrata ‘Sapphire Skies’ (P-1471)
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