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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.
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
E. epsteinii is a dense, low-growing, evergreen perennial with bristle-edged, elongated heart-shaped leaves, bronze when young, and loose sprays of up to 30 white and grey-purple flowers, on 25cm stems, in spring
E. × cantabrigense is a carpeting perennial, to 45cm high, with ovate, toothed foliage, red-tinted when young, turning mid-green and finally red in autumn. Flowers are coppery-pink, with yellow inner petals, held on profusions of tall stems in spring
E. davidii is a deciduous perennial, to 30cm in height and 45cm spread, with bronze-tinted, toothed foliage in spring turning light green when mature. Yellow, long-spurred flowers, 2cm in width, open beneath russet-brown sepals which are carried on coral-red stems in spring
E. × rubrum is a deciduous, rhizomatous perennial to 30cm in height, with attractive, red-tinted young foliage which colours also in autumn. Flowers 2cm in width, crimson, with creamy-yellow spurs
'Akebono' is a pretty pale pink and white flowering cultivar. Flowers are borne from early to late spring. New foliage is red coloured as it emerges, fading to green
'Rose Queen' is an herbaceous perennial to 30cm, with compound leaves, bronze when young, and sprays of long-spurred rose-pink and white flowers 3.5cm in width
E. perralderianum is a slowly-spreading, evergreen perennial growing to 30cm tall. Each leaf has three glossy, oval leaflets with spiny margins that are tinted bronze when young, aging to a darker green. Up to 25 small, bright yellow flowers are held on stems just above the foliage in spring
'Nanum' is a compact deciduous perennial to 20cm, forming a clump of divided leaves, bronze-tinged when young. Long-spurred pale purple flowers 3cm in width are borne in open sprays
'Orangekönigen' is a compact, evergreen perennial forming a dense clump of divided leaves, tinted red when young, with sprays of small flowers with orange sepals and smaller pale yellow petals
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