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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.
Black Tulip is a vigorous, upright, open-branched, deciduous tree with oval leaves up to 15cm long. Before the leaves open, from early to mid-spring, it produces abundant, cup-shaped, rich red-purple flowers, 15cm or more across, with rounded petals
'Daphne' is a small, upright, deciduous tree producing pale yellow, tulip-shaped flowers in mid to late spring
'Spectrum' is a small to medium-sized, upright, deciduous tree producing large, goblet-shaped flowers in mid- to late spring. These open from rich, purple-pink buds; the open petals are pale pink inside, flushed and veined darker outside
'Star Wars' is a small tree or large shrub to 6m, with mid-green leaves and large, fragrant, rosy-pink flowers in mid or late spring
'Summer Solstice' is a large deciduous tree with broad, obovate leaves and fragrant, cup-shaped flowers opening in late spring and early summer from pink buds and retaining some pink tints on the outside of each tepal
'Athene' is a small, deciduous tree producing fragrant, cup-and-saucer-shaped flowers in early and mid spring. These are white with a dark pink base and some dark pink flushing on the outside of the petals
'Caerhays Surprise' is a small, deciduous tree producing waterlily-shaped flowers in mid to late spring. These are lilac pink, with a darker pink flush on the outside of the petals
'Nigra' is a spreading medium-sized deciduous shrub with glossy elliptic leaves to 20cm in length. Flowers erect, narrowly tulip-shaped, with oblong, deep reddish-purple tepals 12cm in length, paler within
'Peter Dummer' is a medium-sized, deciduous tree with fragrant, tulip-shaped flowers appearing before the leaves in mid-spring. The flowers are pink on the outside, shading deeper at the base, and creamy-white inside
'Susan' is an upright medium-sized deciduous shrub with deep reddish-purple buds opening in mid spring to fragrant, cupped flowers with usually 6 tepals, red-purple outside, pink within
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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.