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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
perforate St John's wort cammock
common St John's wort devil chaser devil's flight devil's scourge God's wonder plant herb John human blood Klamath weed penny John rosin rose St Columba's flower
Hypericum can be annuals, perennials, shrubs or trees, evergreen or deciduous, with usually paired leaves and showy yellow flowers with prominent stamens, followed by capsules, occasionally berry-like
H. perforatum is an upright perennial with small, ovate leaves and terminal clusters of star-shaped yellow flowers 1.5cm across
Europe, N Africa, SW Asia
Toxicity Ingestion may cause severe discomfort
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 West-facing or East-facing
Exposure Exposed or Sheltered
MoistureWell-drained, Moist but well-drained
SoilChalk, Clay, Sand, Loam
pHAcid, Alkaline, Neutral
Time to ultimate height
Grows well in moist but well-drained soil. Ideal for wildflower garden or in mixed border
Propagate by seed, division or take softwood cuttings
Suggested planting locations and garden types
Low Maintenance Banks and Slopes
Wildflower meadow Wildlife Gardens
Pruning No pruning required
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.