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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.
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
'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
'Red Chief' is a vigorous, spiny medium-sized deciduous shrub, habit upright to spreading, with rather narrow, purple-red leaves, becoming brighter red in autumn. Flowers pale yellow, followed by deep red berries
'Diabolic' is a compact, bushy, spiny shrub to around 50cm tall and wide. Arching stems bear small, rounded yellow-to yellow-green leaves edged with red when young; leaves turn orange-yellow in autumn. Small yellow flowers in spring are followed by red fruits in autumn
'Red Pillar' is a spiny, deciduous shrub initially columnar, but spreading with age. The foliage is dark purple, turning red in autumn, and the yellow spring flowers are followed by small red berries
'Pow-wow' is a compact, narrowly upright, deciduous shrub, to 90cm tall and 45cm wide. Yellow-green leaves are flushed red in spring and become variegated in summer with splashes of creamy-white before turning shades of orange and red in autumn. Yellow spring flowers are followed by red fruits
'Helmond Pillar' is a slow-growing cultivar with an upright habit, eventually reaching 1.5m in height. Small yellow flowers are borne in late spring, followed by red berries in the autumn; often persisting into winter. Foliage is brownish-red and deciduous; autumn leaf fall exposes the brown, thorny stems
'Harlequin' is a compact deciduous shrub with rounded deep purple leaves, variably splashed with cream and pink, and small pale yellow flowers followed by dark red berries
'Maria' is one of the best columnar golden-leaved cultivars, which keeps its colour and shape well all season; pale yellow flowers in spring
'Boum' is a compact, dwarf shrub with distinctive colouring. Flowers, as with most of the B. thunbergii cultivars, are pale yellow and relatively insignificant, but the leaves are variegated cream/green, contrasting with red stems. New shoots may be pink-flushed in all parts. Scarlet berries develop in autumn when the leaves also turn orange-red
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