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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. longicaulis is an evergreen perennial with trailing stems to 1m in length bearing dark green lance-shaped leaves and clusters of tubular orange-red flowers 5cm in length from summer to early winter
A. aristata is an evergreen perennial to 20cm forming rosettes of fleshy lance-shaped leaves spotted with white and tipped with a soft white spine, with tubular, orange-red flowers 4cm in length in panicles to 50cm in length in autumn
A. striata is a stemless, basal-rosette evergreen succulent to 1m tall and wide. The broad, blue-green leaves are marked longitudinally to a greater or lesser degree with narrow, dark lines; the smooth, pink margins may become a pinkish-red when exposed to full sun. Panicles of coral red flowers are borne in spring
A. variegata is an evergreen perennial to 20cm, forming a clump of rosettes of stiff, fleshy, pointed dark green leaves attractively-banded with white. Racemes of tubular salmon-red flowers in summer
A. vulneraria is a plant of open grassland, dunes and sea cliffs, usually calcareous. Erect to procumbent, with paired heads of yellow to red flowers, the calyces densely white-hairy
B. sutherlandii is a deciduous tuberous perennial to 30cm, with trailing red stems, light green leaves often veined red and abundant orange flowers 2cm across in summer and early autumn
B. darwinii is a dense, medium-sized evergreen shrub, with dark glossy green, broadly oblong, sparsely-spined leaves, and drooping racemes of rich orange flowers, tinged red in bud, followed by blue-black berries
B. vulgaris is a deciduous, prickly shrub reaching 2-3m in height. Clusters of hanging orange-yellow flowers are borne in late spring to early summer, followed by red, ovoid fruits. Twigs are grooved and prickles usually 3-forked. Leaves are green, entire, small-toothed and occur in groups
B. auriculata is an evergreen shrub to 3m, with lance-shaped, dark green leaves white beneath, and small orange-centred, white flowers in dense panicles in autumn and winter
B. globosa is a large semi-evergreen or deciduous shrub to 5m, with dark green leaves and dense globose heads 2cm across of sweet-scented bright orange-yellow flowers in loose clusters at branch tips in early summer
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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.