Aconitum carmichaelii (Wilsonii Group) 'Barker's Variety'

RHS Plant Profile

monk's hood 'Barker's Variety'

RHS

Synonyms

Aconitum wilsonii 'Barker's Variety'
Aconitum carmichaelii 'Barker's Variety'
Aconitum carmichaelii var. truppelianum 'Barker's Variety'

Herbaceous Perennial

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A herbaceous perennial 1.5-1.8m high with upright stems and leathery leaves divided into three to five lobes, deep green above and pale green below, and dense panicles of hooded rich mid-blue flowers in early autumn

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam

Max Height

1.5-2.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: North–facing or West–facing or South–facing or East–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Ranunculaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Columnar upright
Potentially harmful: TOXIC if eatenavoid skin contact. Wear gloves and other protective equipment when handling. Pets: TOXIC if eatenavoid skin contact - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Aconitum can be herbaceous perennials or biennials with lobed leaves and racemes or panicles of showy, hooded flowers
Name Status: Accepted

How to Grow

Cultivation

Grows best in deep, cool, moisture-retentive soil in partial shade, but will also tolerate most soils and full sun if soil is humus-rich and protected with mulch to ensure that it is moist throughout the growing season; provide support if needed; use protective gloves. See staking perennials for further advice

Propagation

Propagate by division in autumn or late winter; division every few years may encourage good flowering stems, though plants may be slow to re-establish; use protective gloves

Suggested planting locations and garden types

Architectural
City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Flower borders and beds
Cut flowers

Pruning

No pruning required except cutting back dead stems; use protective gloves

Pests

Generally pest-free but may be susceptible to aphids

Diseases

May be susceptible to fungal stem rot, powdery mildews, and Verticillium wilt