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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.
C. indivisa is a slow-growing, evergreen erect tree reaching heights of 3m or more. The lance-shaped, blue-green leaves are relatively broad at 10-30cm wide and from 0.6-2m long with an orange-brown midrib. Small, white, star-shaped flowers borne in dense clusters in summer are followed by tiny purple-blue fruits
'Squirrel' is a robust, compact, dwarf evergreen azalea with funnel-shaped, bright reddish-orange flowers in late spring
A. micranthum forms a large shrub or small tree with arching branches and reddish young shoots and greenish-white flowers. Toothed foliage turns orange, yellow and red in autumn
L. nepalense is a stem-rooting lily with rhizomatous bulbs, upright or arching stems, and scattered deep green leaves. The unscented or unpleasantly scented, funnel-shaped flowers, produced in early to mid-summer, are white, greenish or yellow in bud, opening to reveal a maroon centre
N. obvallaris is a bulbous perennial to 30cm tall, with glaucous, strap-shaped leaves and solitary bright yellow flowers with flared trumpets and slightly paler perianth segments, opening in early spring
'Night Star' is a compact plant to 30cm tall, with grey foliage and single flowers 3cm across. Petals broad, with toothed edges, deep red-purple with rich pink margin and blotches
'Brookfield Delight' is a Lilliput dahlia growing to about 50cm, the single flowers having orange rays and a yellow disk
F. viridescens is a cactus with bright green, usually solitary, globose or cylindric, shallowly ribbed stems to 30cm in height; central spines yellow, curved, to 5cm in length. Flowers 5cm, green or tinged with red
'Master Michael' is a rounded, evergreen shrub with wavy-edged leaves that are grey-green above and felted, pale green below. The daisy-like flowers are purple with yellow centres and appear in profuse clusters in late spring
'Jury's Yellow' is a compact and erect evergreen shrub with medium-sized, anemone-form white flowers with conspicuous yellow petaloids in the centre
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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.