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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.
'Corky' is a compact perennial making a clump to 70cm in height, with grassy foliage and open trumpet-shaped lemon yellow flowers, 6cm in width, with mahogany stalks
M. nepalensis is a deciduous ornamental grass to 1m in height with arching, linear green leaves from spring to autumn, often turning bronze in winter. It bears terminal panicles of pale yellow spikelets in summer, forming into yellow seed-heads in autumn, finally turning brown-yellow in winter
C. fulvida is a species from wet habitats in New Zealand. It has large, gracefully curving silver-brown flower panicles, pink-tinged when young, above the arching foliage
'Earthwalker' is strong, vigorous annual, up to 3m high, with coarse green leaves and abundant, multi-headed flowers, in late summer, with dark brown centres and ray florets which may be rich yellow, terracotta orange, dark red or warm brown
'Giotto' is an erect herbaceous perennial to 1.5m in height, with divided foliage and erect spikes of deep blue and violet, semi-double flowers 7cm across, with pale brown eyes
'Goldsturm' is an herbaceous perennial forming a clump to 60cm in height, with erect stems bearing narrowly ovate leaves and dark-eyed, deep yellow flowers to 12cm across
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
N. obliqua is a large, deciduous, fast-growing tree to 20m or more, with alternate leaves in two opposite rows, ovate, shortly toothed, 4-7cm long, dark green above, pale glaucous below, colouring yellow and crimson in autumn
sombrero blanco is a compact, clump-forming perennial to 50cm tall with narrowly ovate leaves and flowerheads of white ray florets surrounding golden-brown cones from summer into autumn
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We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.