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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.
'Sweet Heidy' is a spreading perennial, to 60cm tall, with neat, dense, lobed foliage and bowl-shaped flowers from early summer to early autumn. Flowers are pink, shading to purple with dark veining and a white centre
'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
'Birch Lilac' is a clump-forming herbaceous perennial, about 70cm high, with deciduous, deeply lobed mid-green leaves, and cup-shaped lilac-purple flowers with white centres from late spring to early summer
'Lace Time' is a vigorous, clump-forming, spreading evergreen perennial, to 40cm tall, with light-green basal leaves, shaded yellow when young. White, broadly funnel-shaped, flowers age to pink, are overlaid with a lacework of dark purplish-pink veins, and are borne over a long period from late spring to autumn
'Bevan's Variety' is a strong-growing semi-evergreen perennial forming a wide mat of aromatic, rounded leaves, with deep purplish-pink flowers 2.5cm wide, the prominent sepals brownish-red
'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
G. palustre is a low-growing, clump-forming perennial forming bushy hummocks of fresh green, deeply divided leaves. Flowers are borne on thin stems rising from a central rootstock and are bright pink, trumpet-shaped at first then almost starry when the wide-open, wedge-shaped petals become separated. Has a long flowering season, retaining a fresh appearance
'Geranium' is a vigorous large shrub of strong, arching growth with attractive dark foliage and single, bright scarlet-orange flowers to 6cm in width, with prominent golden stamens flowering in summer. Elongated red hips in 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.