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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
purple hybrid catalpa hybrid catalpa 'Purpurea'
Catalpa bignonioides 'Purpurea'
Catalpa are deciduous trees of spreading habit, with handsome, large leaves and erect panicles of showy, bell-shaped flowers in late summer, followed by persistent, slender bean-like seed capsules
'Purpurea' is a medium-sized deciduous tree. Young shoots and opening leaves blackish-purple, the leaves later dark green. Flowers 3cm, white with orange and purple markings, in large open panicle
Habit Spreading / Branched
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 South-facing or North-facing or West-facing
MoistureMoist but well-drained
SoilSand, Chalk, Loam
pHAcid, Alkaline, Neutral
Higher than 12 metres
wider than 8 metres
Time to ultimate height
Grow in a moist but well-drained, fertile soil in a sunny position. Shelter from strong winds as these may shred the large leaves. Protect from late spring frosts when young
Propagate by softwood cuttings or grafting
Suggested planting locations and garden types
Pruning Pruning group 1, or pruning group 7 when grown as a stooled shrub for foliage effect
Pests Generally pest free
Susceptible to verticillium wilt
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.