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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.
'Bow Bells' is a slow-growing, medium-sized shrub with purplish young growth and small, oval grey-green leaves. Loose clusters of bright pink, bell-shaped flowers, paler within and about 7cm in width, are borne in late spring
'Mariesii Grandiflora' is a small deciduous shrub with glossy ovate leaves and large, flattened Lace-cap flowerheads with blue or pink fertile florets surrounded by large, white sterile ones
R. racemosum is a compact, upright evergreen shrub to 2m, with small leaves, glaucous beneath, and abundant small clusters of funnel-shaped white, light or deep pink flowers 3cm across in early spring
'Rosalie' is a compact, spreading heather to 15cm in height and 40cm wide, with dark bronze-green foliage and racemes of bright rosy-pink flowers from mid winter to spring
'Fascination' is an upright perennial to 1.2m tall, with whorls of lance-shaped, toothed leaves and dense, slender, branched spikes of small light violet-blue flowers in summer and early autumn
'Yellow Queen' is a cultivar of the vigorous, clump-forming species. In May and June it bears exaggeratedly spurred flowers, the central petals being dark yellow, the outer flower parts contrastingly lighter. Foliage is mid green, divided and fern-like
'Fan Zinnoberrosa' is an upright bushy perennial to 60cm tall, usually grown as an annual, with narrow, dark green leaves and deep rose-red flowers 3cm wide, in dense spikes from mid summer to early autumn
'Purpusii' is an evergreen perennial to 15cm, with fleshy trailing stems bearing lance-shaped, greenish-purple leaves, deep purple beneath, and small deep pink flowers in terminal clusters
'Alexander Hunter' is a large, upright shrub of compact growth, with single or slightly doubled, deep crimson flowers 10cm in width
'Orange Glory' is a robust perennial to 1.5m in height, with light green foliage and terminal umbels of red-tipped orange-brown flowers, the inner segments deep yellow, tipped with orange-brown
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