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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.
'Sugar Plum' is a compact deciduous shrub with arching branches of lance-shaped leaves, whitish beneath, and long panicles of rich purple-red, scented flowers
'Thai Sita' has a neat, upright habit, growing to about 30cm. The leaves are narrow and dark green and the stems deep purple. The flowers are purple and white, with dark purple bracts
'Christine Yeo' is a compact perennial forming a substantial clump of erect stems bearing small, aromatic leaves and terminal spikes of purple flowers from late spring to early autumn
'Hansa' is a suckering, deciduous rose with prickly stems, to 1.5m tall, and dark green foliage. Large, fragrant, double flowers, coloured a deep pinkish-purple, borne in summer and autumn, are followed by scarlet hips
'Millennium' grows to 1.8m, with long stems bearing strongly fragrant flowers 6cm across, the standards deep reddish-purple, the wing petals vivid purplish-red
'Pink Gin' is a tender perenial to 1.2m, with light purple, double flowers to 8cm across, slightly darker on the reverse of the florets
Munstead wood forms a small, broad shrub reaching 1m in height. It flowers from summer through to autumn bearing scented blooms that are crimson in bud, opening to large cups in rich blackcurrant shades
'Ushguli Grijs' is a herbaceous perennial, up to 30cm high, forming dense clumps with lobed green leaves, tinted red in autumn, and grey-blue flowers, with purple veins, in early summer
'Golden Jubilee' is an upright, clump-forming perennial, to 90cm tall and wide, with aromatic, lance-shaped, yellow-green foliage. Spikes of fragrant, tubular, violet-blue flowers are borne from summer into autumn
L. lanata is an evergreen dwarf shrub to 75cm tall, with white-woolly stems and leaves, and dark purple flowers in long-stemmed aromatic spikes
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