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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.
'Gerda' is a deciduous shrub or small tree, with deep purple foliage from spring to autumn and flat heads of small, pinkish-purple flowers, followed by purple-black berries
'Laciniata' is a large, bushy deciduous shrub with deeply dissected, fern-like leaves and flat heads of small creamy-white flowers in summer, followed by glossy purple-black berries
'Guincho Purple' is a bushy large shrub or small tree, up to 6m high, with pinnate leaves which open green, turn dark purple in summer, and finally red in autumn. Flowerheads in early summer, of pale pink flowers on dark pink stems, are followed by black fruits in late summer and early autumn
Black Tower is an upright deciduous shrub or small tree, with foliage opening green but soon turning dark purple in a sunny position. Flat heads of musky-scented, pale pink flowers with large red anthers appear in late spring, followed by purple-black berries
'Tenuifolia' is a compact, deciduous shrub with finely cut leaves composed of slender lobes, and occasionally with a few conical panicles of cream flowers, followed by red berries
'Sutherland Gold' is a medium-sized deciduous shrub with attractively dissected, bright golden-yellow, pinnate leaves. Small conical heads of creamy-white flowers followed by glossy red berries, seldom freely-borne
'Eva' is a deciduous shrub to 3m with very deeply dissected purplish-black foliage from spring to autumn, giving a distinctive lacy effect. Flat umbels of tiny pinkish flowers are borne abundantly in summer and have the characteristic grape scent of elder flowers. Purple-black berries may follow
S. nigra is bushy large shrub or small tree to 6m, with pinnate leaves turning pale yellow in autumn, flat sprays of fragrant cream flowers in early summer followed by small black berries
'Aurea' is a large, bushy deciduous shrub with pinnate, deep golden-yellow leaves and flattish heads of small, scented creamy-white flowers followed by purple-black berries
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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.