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All ratings refer to the UK growing conditions unless otherwise stated. Minimum
temperature ranges (in degrees C) are shown in brackets
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.
'Aurea' is a spreading medium-sized deciduous tree with large ovate golden-yellow leaves becoming light yellow-green in summer. Flowers white, marked orange and purple, in conical panicles
C. fargesii f. duclouxii is a good flowering form bearing panicles of trumpet-shaped flowers of pale pink, with brown and orange-spotted throats. These are followed by narrow bean-like seed pods. Large, simple, pointed leaves are tinged bronze in spring. Matures to a round-crowned tree up to 8m in height
C. bignonioides is a spreading medium-sized deciduous tree, with pale green, broad-ovate leaves to 25cm in length. Flowers 3-4cm in width, white, marked with orange and purple, in conical panicles. Fruit a slender bean-like pod
C. speciosa is a tall, spreading tree with large, heart-shaped leaves. Large purple-spotted, white flowers sparsely borne in July, followed by long, slender seedpods
'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
Last-listed in the RHS Plant Finder in 2016
This plant is listed in the RHS Plant Finder book. At present our information about this plant is limited to a list of the nurseries that supply it. In time we will be adding more details including a description, growing information, advice and photographs.
Over 70,000 plants and where to buy them
Britain’s best gardening annual, available now from RHS Mail Order and all good bookshops.
Last-listed in the RHS Plant Finder in 2007
Listed in the RHS Plant Finder
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