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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 2002
the RHS today and get 12 months for the price of 9
Other common names
water plantain deil's spoons
devil's spoons mad dog weed thumbwort
Alisma are rhizomatous herbaceous perennials from wet habitats, with basal rosettes of long-stalked, elliptic leaves and open panicles of small white or pink flowers in spring
A. plantago-aquatica is an aquatic perennial forming rosettes of grey-green leaves to 30cm in length, with tall panicles of white flowers to 1.5cm across in late spring
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 North-facing or South-facing or West-facing
Exposure Exposed or Sheltered
SoilSand, Clay, Loam
pHNeutral, Acid, Alkaline
Time to ultimate height
Grow at pond margins in water up to 30cm deep. Deadhead regularly in order to prevent problems from self-seeding
Propagate by seed sown as soon as ripe or by rhizome division in spring
Suggested planting locations and garden types
Cottage & Informal Garden Wildlife Gardens
Pruning Deadhead regularly in order to prevent problems from self-seeding
Pests Generally pest free
Generally disease free
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.