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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.
P. delavayi is a rhizomatous perennial producing circular leaves up to 30cm across with deep, jagged lobes. These emerge heavily bronzed in spring, changing to very dark green mottling with age. Clusters of narrow, hanging, dark red flowers are produced below the leaves in summer, followed by black fruit
Bonanza Gold is a compact, rounded, deciduous shrub to 60cm tall and wide. Its orange-red shoots bear small, rounded, bright yellow leaves that mature to a yellow-pale green colour. Small clusters of yellow flowers in spring are followed by red berries in autumn
E. × perralchicum is an evergreen perennial to 40cm in height, forming a mat of leaves divided into 3-5 spiny-edged, ovate leaflets. Open sprays of bright yellow flowers 15mm in width
'Charity' is an upright evergreen shrub to 4m tall, with pinnate leaves composed of up to 21 lance-shaped leaflets, and small, cup-shaped yellow flowers borne in erect, clustered terminal racemes to 35cm long in late autumn and winter
'Arthur Menzies' is an upright, evergreen shrub to 3m tall with leaves up to 45cm long comprising up to 19 spiny, blue-green leaflets. Upright racemes of lemon-yellow flowers begin to spread as the small flowers start to open and may be followed by clusters of blue-purple berries
S. hexandrum has deeply 3-5 lobed leaves, green variably mottled with purple, which expand fully, up to 25cm across, after flowering in late spring and summer. Stems at flowering to 30cm in height. Flowers pinkish or white, with yellow stamens. Berries scarlet, egg-shaped, borne on short, drooping peduncles in late summer
'Golden Torch' is a narrowly-upright, slow-growing, deciduous, spiny shrub, to 1.2m tall, with bright yellow to yellow-green foliage that becomes flushed with pink and orange hues in autumn. Small, white spring flowers are followed by red fruits
E. ogisui is a clump-forming rhizomatous perennial up to 35cm high, with evergreen leaves divided into three ovate to narrowly ovate, spiny-toothed leaflets, each up to 6cm long, which emerge marbled with red in spring and mature to mid-green, and spikes of pure white flowers up to 2.5cm across with wide sepals and petals with long, slightly curved spurs, from early spring to mid-spring; Epimedium leaves may be used for their nests by leaf-cutting bees
'Boughton Red' is a compact, evergreen shrub of upright growth, with very small, dark green, prickly leaves. Deep red buds open to light orange flowers in spring, followed by black berries
'Golden Eagle' is a clump-forming rhizomatous perennial 25cm high in leaf, up to 1m high in flower, with evergreen leaves, marked with red when young before becoming shiny mid green, and tall red stems of spidery flowers with pale cream sepals and long-spurred, pale yellow petals, in early spring, and intermittently on to autumn; Epimedium leaves may be used for their nests by leaf-cutting bees
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