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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
'Jury's Yellow' is a compact and erect evergreen shrub with medium-sized, anemone-form white flowers with conspicuous yellow petaloids in the centre
'Becky Towe' is an upright herbaceous perennial with bright pink, mauve-eyed flowers set against green and cream variegated foliage
'Crimson King' is a vigorous medium-sized deciduous tree. Leaves large, 5-lobed, deep purplish-crimson all summer. Flowers reddish-orange, in clusters on leafless branches
'Eileen Postle' is a compact plant to 30cm in height, with cerise flowers 6cm across, the upper petals dark-veined
'Daydawn' is a spreading, bushy deciduous shrub to 80cm tall, with small, pinnate leaves and saucer-shaped pale yellow flowers tinged yellow and pink, from early summer to early autumn
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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.