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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.
'Hadspen Abundance' is a perennial with leaves composed of three ovate leaflets. Flowers 5-7cm in width, rich, deep, purplish-pink, with five rounded tepals
'Prinz Heinrich' is an herbaceous perennial with attractively divided leaves and semi-double flowers with 10-15 narrow, overlapping, deep rose-pink tepals
'Praecox' is a deciduous perennial spreading by suckers, with erect stems bearing 3-parted leaves and bowl-shaped deep pink flowers 5-6cm across in late summer and autumn
'Lady Gilmour' is a tall perennial with leaves of three leaflets that have crisped margins when young; bowl-shaped pink flowers 6cm across have about 12 narrow, somewhat twisted petals
'Pretty Lady Diana' is a compact cultivar reaching 60cm in height. Single flowers of mixed pinks, with a central boss of yellow stamens, bloom through summer and early autumn
'Pamina' is an erect perennial to 75cm, spreading by suckers, with divided foliage and double, deep pink flowers 5cm across, forming a neat rosette of many narrow tepals
'Whirlwind' is a tall suckering perennial with large leaves of three leaflets, and semi-double white flowers 6cm wide, with narrow, slightly rolled petals
'September Charm' is an herbaceous perennial to 75cm, with leaves composed of three oval leaflets, and slightly cupped flowers 6-8cm wide, with 6-9 light rose-pink petals, deeper pink beneath, opening in late summer and autumn
'Andrea Atkinson' is an herbaceous perennial to 1m tall, with lobed basal leaves and white flowers 6cm wide, tinged with pink and green on the outside, and opening in late summer and autumn
'Bowles' Pink' is an erect, suckering perennial with leaves composed of three leaflets, and bowl-shaped reddish-purple flowers in late summer and autumn, the two outer tepals smaller and darker
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