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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
Hokkaido Jacob's ladder [Bressingham Purple]
Polemonium yezoense var. hidakanum 'Polbress'
Polemonium can be annuals or herbaceous perennials or upright or spreading habit, with pinnate leaves and usually clustered, tubular, bell, or funnel-shaped flowers
Bressingham Purple is a herbaceous perennial with foliage that is purple-tinged in spring and autumn. It bears clusters of sky blue flowers, marked in a darker blue with a small white centre. These are cupped in shape and are held in clusters from late spring to midsummer
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 West-facing or East-facing
MoistureMoist but well-drained
SoilClay, Chalk, Loam, Sand
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in any fertile, moist but well-drained soil preferably in full sun or partial shade
Propagate by division in spring
Suggested planting locations and garden types
Flower borders and beds
Cottage & Informal Garden
Pruning Deadhead flowered stems so as to prevent self-seeding
Pests Generally pest free
Generally trouble-free, but may be subject to powdery mildews
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.