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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.
Wisteria x formosa is a vigorous, deciduous, twining cultivar. Highly scented, pea-like, pale to mid-purple flowers are produced on short trusses about 20cm long, in early summer
'Nana Richin's Purple' is a deciduous, twining, slow-growing climber with glossy foliage divided into lance-shaped leaflets. A profusion of fragrant lavender-purple flowers are borne in long racemes from late spring into early summer
W. floribunda is a vigorous deciduous climber with pinnate leaves and, in early summer, fragrant, pea-like, violet-blue, pink or white flowers in racemes to 30cm or longer
'Kuchi-beni'' is a clockwise-twining cultivar. The scented flowers are very pale lilac pink, with purple shading on the tip of the keel, produced in hanging clusters up to 45cm long in early summer. The foliage is pale green in spring and yellow in autumn
'Kimono' is a deciduous, twining climber with leaves divided into narrow, lance-shaped leaflets. This free-flowering cultivar produces long racemes of fragrant white flowers tinged violet-blue from late spring into early summer
'Shiro-kapitan' is an anticlockwise twining cultivar. The leaves are up to 35cm long with about 11 downy leaflets. Flowers in hanging sprays 10-15cm long are white with a central yellow stain and highly scented . The bean-like seedpods are velvety and up to 20cm long
'Honi-beni' is a large, strong-growing deciduous, twining climber with dark green, pinnate leaves and drooping racemes to 60cm in length, crowded with fragrant, pale rose flowers tipped with purple, with the leaves
W. floribunda f. multijuga is a large twining, deciduous climber with large pinnate, dark green leaves and drooping racemes to 1m long, of fragrant, lilac flowers with dark violet markings, opening with the leaves in early summer
'Prolific' is a vigorous, nitrogen-fixing deciduous climber up to 9m high with stems twining anticlockwise, pinnate leaves of 9-13 elliptic or ovate leaflets, and many very fragrant, soft blue-violet flowers in dense, hanging racemes 25-30cm long in late spring and early summer, often followed by bean-like seed pods; it often flowers from a young age, and the flowers are visited by bees in bright or warm weather
W. brachybotrys is a vigorous, deciduous climber twining anticlockwise and reaching a height and spread of 9m or more. The leaves comprise 9-13 oval to ovate, downy leaflets. Slightly fragrant, violet-blue to white flowers up to 3cm long are borne in racemes 10-15cm long and followed by velvety seedpods
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