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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.
'Ashby' is a bushy plant growing to 90cm tall and wide at maturity. The lobed, scented leaves are mid- to dark-green and flowers are a pink-purple colour with dark central markings on the upper petals
'Rodomont' is a trailing plant with stems to 30cm, and semi-double, deep rose-pink flowers, the lower petals streaked with purple
'Bushfire' is a bushy plant to 50cm, with bright red flowers, each petal with a dark blotch
'Mrs G.H. Smith' is a white-flowered cultivar with a feathered flash of cerise on the upper two petals. Its dainty, viola-shaped blooms are borne profusely through the growing season
'Copthorne' is a bushy plant to 50cm in height, with boldly lobed, spicily-scented leaves and light mauve flowers with the upper petals marked with purple
'Radula' is a robust, bushy plant to 75cm in height, with lemon and rose-scented leaves deeply cut into narrow segments, and small pink flowers marked with purple
'Mrs J.C. Mappin' is an erect plant to 45cm with grey-green leaves edged with creamy-white, and small clusters of single white flowers with salmon-pink eye
'Vancouver Centennial' is a compact plant to 25cm in height, with lobed, bronze and golden-brown leaves and clusters of orange-red flowers
'Brian West Butterfly' is a small, evergreen, bushy plant. The green leaves have a lighter green, butterfly-shaped central marking and double pink flowers fading to a white eye are borne in spring and summer
'Flower of Spring' grows to 45cm in height, with rounded leaves margined with white, and large clusters of single scarlet flowers
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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.