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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.
D. ambiguum is a cormous perennial with long, narrow, evergreen leaves. The rich pink, hanging, bell-shaped, flowers are carried in mid- to late summer on wiry, arching stems about 80cm tall
'Guinevere' is a clump-forming perennial with up to 1m long narrow leaves. In summer it produces arching stems with nodding, cool-white flowers with a slight pink-purple tinge
D. pulcherrimum is an elegant perennial forming a clump of long, narrow, evergreen leaves, with tall, arching stems bearing nodding, bell-shaped, rosy-purple flowers 4-6cm long in summer
D. pulcherrimum var. album is a tall, graceful perennial with long, strap-shaped leaves and white, bell-shaped flowers in groups on fine, arching stems
D. mossii is an evergreen perennial, to 45cm in height, with long, strap-like leaves and vivid pink, bell-shaped flowers in summer, carried in sprays on fine, arching stems
D. pendulum has narrow leaves to 50cm long, and arching flower stems to 1m bearing drooping panicles of flaring, bell-shaped pink flowers with papery brown bracts. A less substantial plant than D. pulcherrimum
D. pauciflorum forms dense clumps of short leaves about 30-40cm high. Reddish-pink hanging flowers are produced in summer on arching stems slightly taller than the foliage
D. robustum is a cormous perennial to 1.5m forming a clump of tough, narrow, evergreen leaves. Tall, arching stems support hanging sprays of pale pink, bell-shaped flowers, with silvery bracts, in mid to late summer
D. dracomontanum makes a clump of grassy foliage, with arching stems bearing rose-pink or coral-pink flowers 3cm long in summer
'Blackberry Bells' is an evergreen perennial, to around 1m in height, with long, narrow, strap-like leaves and deep pink-purple, bell-shaped flowers carried in sprays on fine, arching stems in summer
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