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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
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
'Jury's Yellow' is a compact and erect evergreen shrub with medium-sized, anemone-form white flowers with conspicuous yellow petaloids in the centre
'Whirling Butterflies' is an upright herbaceous perennial to about 80cm, producing airy spires of delicate white flowers with long white stamens, opening from pink buds over a long period from late spring to early autumn
'Imperial Gage' is a greenish-yellow, juicy sweet gage that crops reliably. Partly self-fertile and in pollination group 2, but will fruit better with a pollination partner from group 1, 2 or 3. Flowering time is very early so it is subject to frost damage. Fruiting season is around the middle of August
'Devon Maid' is a bushy evergreen perennial with grey foliage and stems to 35cm, bearing clove-scented, semi-double white flowers 5cm in width, with fringed petals and a deep crimson eye
A. × prunifolia, the purple chokeberry, is probably a natural hybrid between A. arbutifolia and A. melanocarpa. It has a multi-stemmed habit, white flowers in late spring followed by purple-black berries and matt, dark green leaves with brilliant autumn colour
I. magnifica is a bulbous perennial to 50cm in height, with arching, glossy green leaves and 2-6 pale lilac flowers 8cm in width from the leaf axils in late spring, the falls near-white with a yellow centre line
'Sunburst' is a self-fertile cherry with large, sweet, very dark red fruit in midsummer, white spring blossom and good autumn colour
'Schneehaube' is a mat-forming, evergreen perennial, to 20cm tall, with loose rosettes of toothed, grey-green, oval leaves and, in spring, masses of fragrant, white flowers
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