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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.
B. albosinensis var. septentrionalis is a medium-sized deciduous tree of open habit, with peeling coppery-pink or orange bark. Leaves oval, turning yellow in autumn. Flowers in slender brown catkins
B. nigra is a bushy deciduous tree to 15m or more, with peeling bark, at first reddish-brown, later almost black; glossy dark green leaves turn yellow in autumn
'Aurea' is a large, conical, deciduous tree with yellow-green leaves. Conspicuous male catkins, to 10cm long, appear in spring. The smaller female catkins are followed by small, cone-like fruit that turn dark brown in autumn and persist into winter
'Forest Blush' is a strong-growing, upright, deciduous tree to 18m tall. The smooth bark is white to pink, and the elegant leaves turn yellow in autumn; yellow-brown male catkins to 12cm long open in early spring
C. colurna is a medium-sized deciduous tree of symmetrical, conical habit, with slightly lobed broadly-ovate leaves. Pendulous yellow catkins to 8cm in length. Nuts held within a deeply fringed husk
'Fuscorubra' is a large, multi-stemmed shrub to about 3.5m with deep purple foliage. Soft pinkish-purple catkins are produced in late winter or early spring, followed by edible, dark pinkish-red nuts
A. rubra is a medium-sized tree, to around 19m, fast-growing with a graceful habit, producing a narrow pyramidal head with rather pendulous branches. Leaves large, lobed, dark green above, greyish beneath. Long male catkins to 15cm. Fruits barrel-shaped, to 1.5cm long
'Inverleith' is an upright, open-branched, deciduous tree to 15m tall usually grown for its peeling white bark. The tapered, ovate, dark green leaves up to 12cm long turn yellow in the autumn; yellow-brown catkins appear in spring with the new leaves
'Red Panda' is a conical, upright tree with peeling, coppery-pink bark and oval, tapering leaves 7cm long, turning yellow in autumn. Hanging, yellow-brown male catkins open with the leaves
B.schmidtii is a medium to large tree, to 30 metres, with thickish branches. It is distinguished by its almost black bark , which sheds in thick, small plates rather than peeling, and by its erect female catkins in spring. These show above the gracefully pointed, short stalked leaves
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