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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.
© RHS 1990
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Other common names
armed bear's breech spiny bear's breech
spiny bear's breeches
Acanthus are robust herbaceous perennials with handsome, lobed foliage and tall, erect racemes of two-lipped flowers with colourful bracts
A. spinosus is a handsome herbaceous perennial to 1.2m, with large, deeply lobed and spine-tipped, dark glossy green leaves. Erect spikes of white flowers with spiny purplish bracts in late spring and summer
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or North-facing or East-facing or West-facing
Exposure Exposed or Sheltered
SoilLoam, Chalk, Sand
pHAcid, Alkaline, Neutral
Time to ultimate height
The ideal soil is a deep, fertile, well-drained loam but it will grow in most soils and has good drought tolerance.
Propagate by division or by root cuttings
Suggested planting locations and garden types
Drought Resistant Flower borders and beds Cut Flowers Low Maintenance
Architectural Cottage & Informal Garden Mediterranean Climate Plants
Pruning Cut down old flower stems
Pests Generally pest free
Powdery mildews may be a problem
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.
Join the RHS today and get 12 months for the price of 9