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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:
the RHS today and get 12 months for the price of 9
Other common names
Chinese meadow rue 'Hewitt's Double'
Thalictrum dipterocarpum 'Hewitt's Double' misapplied
Thalictrum can be rhizomatous or tuberous perennials with ternately or pinnately divided, often attractive foliage, and panicles or racemes of small flowers with showy stamens and sometimes large colourful petal-like sepals
'Hewitt's Double' is an erect herbaceous perennial to 1.5m in height, with attractively divided leaves and tall panicles of long-lasting, rosette-like, double lilac-purple flowers
Toxicity Contact with foliage may irritate the skin
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect East-facing or West-facing
MoistureMoist but well-drained, Poorly-drained
SoilClay, Loam, Chalk
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in moist, humus-rich soil in partial shade. May need staking
Propagate by division as new growth begins in the spring
Suggested planting locations and garden types
Flower borders and beds Cut Flowers
Cottage & Informal Garden Wildlife Gardens
Pruning Cut down stems once flowering is over
Pests Generally pest free
May be subject to powdery mildews in dry conditions
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
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Join the RHS today and get 12 months for the price of 9