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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.
A. japonica is a herbaceous perennial producing a clump of leaves up to 75cm long, with divided, lobed leaflets. Narrow, branched flower spikes are produced in late summer and autumn, reaching up to 1m tall with small, fluffy, white flowers
'Actaea' is a bulbous perennial to 45cm in height, forming a clump of narrow, strap-shaped leaves, and fragrant, pure white flowers 8cm in width, with a small, red-rimmed yellow cup, in late spring
A. podocarpa is a perennial with pinnately divided leaves and slender, branched racemes of pink-tinged white flowers from late summer to early autumn, followed by brown follicles
Misty Blue is an herbaceous perennial, to about 75cm tall, with divided, soft blue-green foliage. Spikesof fluffy, creamy-white flowers are followed by white berries, each with a dark spot at the tip and held on red stalks
'Brunette' is a perennial with upright, brownish-purple stems and foliage, and dense racemes of small, fragrant white flowers in early autumn, tinted purple in bud
'White Pearl' is a tall cultivar with pale green stems, leaves and flower buds. Narrow spires of slightly fragrant white flowers appear in late summer-autumn
Atropurpurea Group are upright plants with brown-purple stems and foliage, and dense spikes of small, fragrant, white flowers in early autumn, often tinted purple in bud. There are a number of named cultivar within this group, chosen for their very dark leaves. Leaf and stem of un-named forms can vary; for best results choose plants in leaf
'Hillside Black Beauty' forms a clump of reddish-purple leaves, with tall purple stems bearing narrow racemes of small, fragrant pale pink flowers in early autumn
A. spicata is a clump-forming, herbaceous perennial with divided leaves up to 60cm long. From mid-spring to early summer it bears oval clusters of fluffy white flowers followed by black berries 1cm across
A. rubra is a clump-forming herbaceous perennial to 50cm, with bright green, divided leaves and spikes of small, fluffy white flowers in late spring and early summer, followed by glossy scarlet berries
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