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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.
'Claire Maxine' is most notable for its gleaming, puckered foliage, mid-green, reddening in winter. Flowers are deep pink but sometimes hidden beneath the leaves; flowers mostly in spring with sporadic flowers produced through to October
'Vinterglöd' is a herbaceous perennial, up to 40cm high, with glossy, dark green leaves, flushed with red in winter. Dark pink flowers are produced on dark red stalks in spring and often also later in autumn
'Sunningdale' has deep-pink flowers with redder centres held over erect leaves in a range of surface colours, with striking red reverses
'Irish Crimson' has deep-pink nodding flowers held up above neat, narrow, upstanding leaves with intense red winter colour
'Biedermeir' has robust heads of large flowers in clean pale pink with darker centres; flowers mostly in spring with sporadic flowers produced through to October. Foliage green with red tints, particularly at the margins, all year round
'Eroica' has vivid purple-pink flowers on tall, branching, colourful stems, held above bronze-green leaves that redden in winter. A very floriferous cultivar with good frost-resistance
B. ciliata is an evergreen, clump-forming perennial with large, round, hairy leaves, tinged red early in the season. In spring, red stems bear white flowers that age to pink. Leaves may be damaged by frost, but fresh ones are produced in spring. Reaches 30cm in height
'Morgenröte' is an evergreen perennial forming a clump of leathery, rounded, deep green leaves, with erect, crimson stems to 50cm in height, bearing clusters of deep carmine-pink flowers
'Baby Doll' is a compact plant to 30cm tall, with rounded, bright green leaves to 10cm wide, and short sprays of pale pink flowers in spring, their colour becoming deeper with age
'Tubby Andrews' is a clump-forming perennial to around 30cm high. It has highly-distinctive, large, rounded fleshy leaves, variegated green and light green in spring and summer turning green and pink in autumn and winter. Clusters of pink flowers are borne on erect red stems in spring
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