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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.
the RHS today and get 12 months for the price of 9
Other common names
knotweed 'Donald Lowndes'
Polygonum affine 'Donald Lowndes'
Persicaria can be annuals, herbaceous or evergreen perennials or sub-shrubs with simple leaves and small bell-shaped white or pink flowers in long-lasting spikes or panicles
'Donald Lowndes' is a mat-forming, partially evergreen perennial to 20cm in height, with dark green, narrowly elliptic leaves and erect spikes of small pink flowers which darken with age, finally turning orange-brown
Habit Mat forming
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 East-facing or West-facing
Exposure Exposed or Sheltered
MoistureMoist but well-drained
SoilClay, Loam, Sand, Chalk
pHAlkaline, Neutral, Acid
Time to ultimate height
Easy to grow in any moist soil in full sun or partial shade
Propagate by division in spring or autumn
Suggested planting locations and garden types
Banks and Slopes Flower borders and beds Garden Edging Ground Cover
City & Courtyard Gardens Coastal Cottage & Informal Garden Gravel Garden Patio & Container Plants Rock Garden
Pruning Deadhead faded spikes
Pests Generally pest free
Generally disease free
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.