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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
Trillium are rhizomatous, herbaceous perennials with erect stems bearing a whorl of ovate or diamond-shaped leaves, with one or more erect or nodding flowers borne at the stem apex
T. rivale is an herbaceous perennial to 12cm, the upright stems each bearing a whorl of three ovate leaves and a solitary terminal flower 3-4cm in width, with three ovate pinkish-white petals speckled purple near base
W United States
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 East-facing or West-facing
MoistureMoist but well-drained
SoilChalk, Loam, Sand
Up to 10 cm
Time to ultimate height
Grow in deep, moist but well-drained, humus-rich, preferably acid to neutral soil in deep or partial shade. Mulch in autumn with leaf mould
Propagate by seed, in pots in a shady cold frame as soon as seed is ripe; takes 5-7 years to reach flowering size. Propagate rhizomes by division after flowering or cut out the growing point from the rhizome after flowering, which stimulates the formation
Suggested planting locations and garden types
Flower borders and beds Underplanting of Roses and Shrubs
Cottage & Informal Garden Rock Garden
Pests Slugs and snails may be a problem
Generally disease free
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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Join the RHS today and get 12 months for the price of 9