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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. chinensis is a compact deciduous shrub with neat, oval, dark green leaves and clusters of slightly fragrant white flowers in summer and autumn
A. distichum is a scrambling deciduous shrub with slender branches bearing dark green leaves and racemes of forsythia-like, fragrant white or pale pink flowers 1cm across
A. microphylla is an evergreen perennial with prostrate rooting stems and small, pinnate leaves tinged bronze when young. Globular whitish flowerheads, on short stems, are followed by attractive reddish burrs 2.5cm in width
A. saccaticupula is a vigorous, evergreen perennial producing pinnate leaves, to 8cm long, grey-blue with 9-13 leaflets. Spherical white flowerheads are followed by dark red burrs to 2cm across, with pinkish-red spines in midsummer
A. mollis is a vigorous plant with large, glossy dark green leaves, pinnately lobed and, in late summer, tall racemes of white flowers with dusky purple bracts
A. spinosus is a handsome herbaceous perennial to 1.2m, with large, deeply lobed and spine-tipped, dark glossy green leaves. Erect spikes of white flowers with spiny purplish bracts in late spring and summer
'Ivorine' is a herbaceous perennial that produces dense racemes of ivory flowers in late spring and early summer
A. pachypoda is an herbaceous perennial to 90cm, forming clumps of divided, bright green leaves. Spikes of small fluffy white flowers are followed by white berries with conspicuous red stalks
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
A. kolomikta is a large vigorous deciduous climber with twining stems. Leaves ovate, those of mature plants tipped with silver, later pink. Flowers white, male and female on separate plants. Grown for foliage effect
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