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AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
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Other common names monkshood monk's hood
Adam and Eve bear's foot common aconite common monk's cowl Cupid's cap dumbledore's delight Elijah's chariot flapdock grandmother's nightcap friar's cap garden monk's hood garden wolf's bane Helen flower Helen's flower helmet flower monk's cap pops soldier's cap Turk's cap Venus's chariot drawn by two doves
Family Ranunculaceae
Genus Aconitum can be herbaceous perennials or biennials with lobed leaves and racemes or panicles of showy, hooded flowers
Details A. napellus is an upright tuberous perennial to 1.5m tall, with deeply divided, dark green leaves and tall spires of violet-blue, hooded flowers in mid and late summer
Plant range Europe, Asia, America
Foliage Deciduous
Habit Bushy
Toxicity All parts are highly toxic if eaten
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H7
Partial Shade
Aspect North-facing or West-facing or East-facing
Exposure Sheltered
Clay
Loam
MoistureMoist but well-drained, Poorly-drained
SoilClay, Loam
pHAcid, Alkaline, Neutral
Ultimate height 1-1.5 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 2-5 years
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 City & Courtyard Gardens Cottage & Informal Garden
Pruning Cut down plants in autumn
Pests Generally pest free
Diseases May suffer from powdery mildews
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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