Aconitum

Monkshood

First cultivated in the mid-1500s, Aconitum derivatives were used as both a medicine and a poison, and an unwanted husband might have easily met his end while drinking his dear wife’s tonic. Simply Medieval! Leaves, stems and roots are poisonous, but the stately Aconitum still deserves a place in our gardens because of the unusual late season blooms it hoists in masses on stalwart stems.

An excellent cut flower, unique for its large, draped sepal, Aconitum loves moist, but not wet soils, cool summer nights, and protection from the heat of the day. Perfect in the border or at woodland’s edge, their bold presence makes an engaging companion to Anemone, Helenium and late blooming Persicaria.

<i>Aconitum</i> x <i>cammarum</i> ‘Bressingham Spire’

A stockier, dignified cultivar that doesn't need staking, this Aconitum's deep blue-violet spires are narrow and tapered. Helmetlike flowers line the straight, sturdy stems, each central shaft first showing color, than the side spikes following suit. Anchored by a compact, bushy mass of polished and narrowly fingered, dark forest greenery, ‘Bressingham Spire’s cool-colored floral display soothes Centaurea macrocephala’s sun-struck blooms.

Blooms June–August.

Size: 2' 0" – 3' 0" high x 18" wide.

Hardy to zone 4.

A captivating departure from our solid-hued Monkshood selections, 'Eleonora' offers pretty bicolored creamy white helmet-style blooms ornamented with delicate violet-blue edges on openly branched terminal panicles. The intensely segmented, deep green leaves are smooth and shiny, and tend to be lax at the base before climbing steadfast straight-backed stems, while the light-colored flowers look their best when showcased against a dark foil.

Blooms June–August.

Size: 3-1/4' high x 18" wide.

Hardy to zone 4.

<i>Aconitum</i> x <i>cammarum</i> ‘Stainless Steel’

Lavish steel blue shafts are the great reward of this easy-to-cultivate perennial. Cloaking strong stems, the glossy grayish green foliage is deeply divided into narrow fingers. Crocosmia ‘Eastern Promise’s orange flowers make a satisfying complement to the smoky hue of ‘Stainless Steel’.

Blooms mid-June–August.

Size: 3-1/2' high x 18" wide.

Hardy to zone 4.

<i>Aconitum carmichaelii</i> ‘Arendsii’

For this fine cut flower’s plentiful show of large, vividly violet-hued flowers embellishing tall spikes, and its vigorous stature, many gardeners consider ‘Arendsii’ to be among the best of the late flowering Aconitums. Broadly segmented, deep green leaves have a lustrous, leathery quality. Plant Kniphofia linearifolia nearby and enjoy a late summer splash of color.

Blooms July–early October.

Size: 3-1/2' high x 18" wide.

Hardy to zone 4.

<i>Aconitum fischeri</i>

This commanding Chinese denizen has a lot to offer: unyielding medium-sized stature that never needs staking, gleaming verdant foliage and crystal clear late season bloom. Garnishing stiff dark blue-violet spires, the hood-shaped flowers surmount ramrod straight stems wrapped in triclefted green leaves, each further carved by stylish lobes and toothed edges. Aconitum fischeri�s dignified persona is ideal, either for a midborder position flanked withMuhlenbergia r. Undaunted.

Blooms August–early October.

Size: 2' 0" – 3' 0" high x 12" – 18" wide.

Hardy to zone 4.

Intense dark indigo-blue hooded blooms densely garnish a unique presentation of lovely large and wide-branching panicles, without the distraction of a dominant central leader. Tapered strong slender stalks and deeply cut, varnished forest green foliage bolster a flowery spectacle that tantalizes the floral trade and keeps our attention sparked through late summer with its architectural seed pod-studded stems. Steeped in grandeur since 1898, when legendary plantsman Maurice Prichard first introduced it, this AGM winning Aconitum can be mingled amongst dusky colored blossoms or the bright yellows of Helianthus ‘Capenoch Star’.

Blooms August–September

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

Hardy to zone 3.

Strong steeplelike stalks elegantly showcase hooded, close-set ivory white flowers on branching stems. A cool classic look is achieved when illuminated blossoms unfurl above an urbane bushy clump of gleaming deeply lobed, dark green leaves.

One of the first Aconitums to bloom, this 1958 Alan Bloom selection can be affiliated with other beauties such as Phlomis ‘Amazone’ and Heuchera ‘Wendy’.

Zone 3/4.

Blooms May–June.

Size: 2' 0" – 3' 0" high x 12" – 15" wide.

Zone 3/4.

  • Catalog Navigation Menu Top
  • Perennials at Digging Dog Nursery
    • Perennials: Acaena to Anthemis
    • Perennials: Anthriscus to Astrantia
    • Perennials: Baptisia to Cynoglossum
    • Perennials
    • Perennials: Fallopia to Gunnera
    • Perennials: Haloragis to Inula
    • Perennials: Kirengeshoma to Morina
    • Perennials: Nepeta to Pulmonaria
    • Perennials: Rheum to Succisella
    • Perennials: Teucrium to Yucca
  • Ornamental Grasses at Digging Dog Nursery
    • Grasses: Acorus to Deschampsia
    • Grasses: Elymus to Uncinia
  • Shrubs at Digging Dog Nursery
    • Shrubs: Arctostaphylos to Halimiocistus
    • Shrubs: Hebe to Weigela
  • Trees & Vines
  • List by Genus
  • Gift Certificates
  • T-Shirts
  • Gift Cards & Etchings
  • Slideshow
  • Gallery
  • Catalog Navigation Menu Bottom

Latest News

Chillin' in Autumn 2018!

Digging Dog Nursery's Chillin' in Autumn sale is here!

Purchase a minimum of $100…MORE

Digging Dog's Late October Newsletter is on it's way to your inbox!

Meadow-style perennials, Chillin’ in Autumn Sale, Lively late season plants!

Pollinator-friendly Meadow-style perennials…MORE



Current Staff's Favorite Plant

Current Staff's Favorite Plant

Helianthus 'Sheila's Sunshine', Persicaria 'Summer Dance', and Selinum wallichianum

Helianthus ‘Sheila’s Sunshine - P-0461

The sunflower was once an emblem of the Sun God of the Incas. Our sunflowers tolerate a wide range of garden soils, attract bees, and make great cut flowers. Blooms early August – October.

Persicaria ‘Summer Dance’ - P-1312

With foliage that’s close to lime-green, and spiky floral tails that approach the scarlet spectrum of rosy pink, this slow spreading perennial is sure to please. Happiest in semishade with ample moisture. Blooms August–November.

Selinum wallichianum - P-1406

This refined Himalayan beauty happens to be one of our favorite perennial umbellifers. With untold elegance, infinitely divided leaves craft a delicate, lacelike transparency. The compact yet airy green canopy is framed by distinctive, purple-infused branching stems that elevate a charming, late season display of white flattened umbels.

Subduing the riotous array of summertime blooms, it seldom needs staking, and appreciates a well draining moist niche. Blooms June–August.

Digging Dog Nursery Right Border