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We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
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
monk's hood 'Stainless Steel'
Aconitum septentrionale 'Stainless Steel' Aconitum × cammarum 'Stainless Steel'
Aconitum can be herbaceous perennials or biennials with lobed leaves and racemes or panicles of showy, hooded flowers
'Stainless Steel' is a striking cultivar with almost grey flowers rather than the blues usual to this genus; the flowers are cream internally
Toxicity All parts are highly toxic if eaten, all parts may be harmful through skin contact. Wear gloves and other protective equipment when handling
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect North-facing or West-facing or East-facing
MoistureMoist but well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Time to ultimate height
Best grown in moisture retentive, fertile well-drained soil in partial shade but will tolerate most soils and full sun. Staking (see staking perennials) may be necessary
Divide every third year in autumn or late winter to maintain vigour but sometimes plants are slow to re-establish. Use protective gloves when handling any part of the plant
Suggested planting locations and garden types
Cut Flowers Flower borders and beds
Cottage & Informal Garden
Pruning Cut down old flowering stems when flowering is finished
Pests Aphids may be a problem
Crown rot, Verticillium wilt, bacterial spotting of the foliage and powdery mildew may be problematic
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.