• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Aconitum 'Spark's Variety'

monk's hood 'Spark's Variety'

AGM plants

AGM plants have been through a rigorous trial and assessment programme. They are:

  • Excellent for ordinary use in appropriate conditions
  • Available to buy
  • Of good constitution
  • Essentially stable in form & colour
  • Reasonably resistant to pests & diseases
monk's hood 'Spark's Variety'

© RHS 2002

  • Other common names monk's hood 'Spark's Variety'

  • Synonyms Aconitum napellus 'Spark's Variety'
    Aconitum 'Henryi Sparks Variety'

  • Family Ranunculaceae

  • Genus Aconitum can be herbaceous perennials or biennials with lobed leaves and racemes or panicles of showy, hooded flowers

  • Details 'Spark's Variety' is an upright herbaceous perennial to 1.5m in height, with deeply divided, glossy dark green leaves and branching spikes of hooded, deep violet-blue flowers

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

  • Toxicity All parts are highly toxic if eaten

  • 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

Sunlight

  • Partial Shade

  • Aspect East-facing or West-facing or North-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Clay

    Clay

  • MoistureMoist but well-drained

  • SoilLoam, Clay

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Best grown in cool, moist, fertile in partial shade, but will tolerate most soils and full sun if soil is improved with well-rotted organic matter and mulched.

Propagation Propagate by division in autumn or late winter to maintain vigour but plants may be slow to re-establish. Use protective gloves when handling any part of the plant

Suggested planting locations and garden types Flower borders and beds Cut Flowers Coastal

How to care

Pruning Cut down plants in autumn

Pests Generally pest free

Diseases May suffer from powdery mildews

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