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ACONITUM carmichaelii (Arendsii Group)

Image of Aconitum carmichaelii (Arendsii Group)

JC Raulston Arboretum at NC State University

Family

Ranunculaceae

Botanical Name

ACONITUM carmichaelii( Arendsii Group)

Plant Common Name

Carmichael's Monkshood

General Description

Autumn flowered monkshood is a tuberous-rooted perennial originally from China and valued for its late season bloom. The Arendsii group hybrids are known for their compact, sturdy flower spikes, large leaves and azure-blue blooms. The leaves are produced in mounds and are delphinium-like, green, deeply dissected, toothed and have a leathery texture. Deep blue flowers, each curiously shaped like a helmet or hood are produced atop leafy, tall, stately spikes in late summer and fall.

Plant monkshood in evenly moist but not wet soil. Full sun to partly shady locations are preferred. Monkshood grows best in zones with cool nights and appreciates some afternoon shade in warmer areas. Propagation is by seed or division, though monkshood can be slow to establish if disturbed. Cut back spent flower stalks to encourage new blooms. Monkshood blooms are a delight in fall gardens, use in areas where moistures is adequate, woodland gardens, along streams or ponds and in boarders.

Avoid planting monkshood near where children play, contamination of veggie gardens is possible and incidental contact can occur. Gloves are recommended when working with monkshood. All parts of monkshood pose health concerns for humans and other animals, for more information about the toxicity of this plant see http://cal.vet.upenn.edu/projects/poison/plants/ppmonks.htm .

Characteristics

  • AHS Heat Zone

    8 - 3

  • USDA Hardiness Zone

    3 - 8

  • Sunset Zone

    A1, A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21

  • Plant Type

    Perennial

  • Sun Exposure

    Full Sun, Partial Sun, Partial Shade

  • Height

    3'-4' / 0.9m - 1.2m

  • Width

    1'-2' / 0.3m - 0.6m

  • Bloom Time

    Late Summer, Early Fall, Fall

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Average

  • Soil type

    Clay, Loam, Sand

  • Tolerances

    Wet Site

  • Growth Rate

    Medium

  • Water Requirements

    Average Water, Ample Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Blue

  • Fruit Color

    Black

  • Foliage Color (Spring)

    Green, Dark Green

  • Foliage Color (Summer)

    Green, Dark Green

  • Foliage Color (Fall)

    Green, Dark Green

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Coarse

  • Foliage Sheen

    Glossy

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bedding Plant, Bog Garden, Container, Cutflower, Mixed Border, Water Gardens

  • Sharp or Has Thorns

    Yes

  • Invasive

    Sometimes

  • Self-Sowing

    Yes