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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.
'Lars' has characteristic palmate, toothed foliage. It bears reddish-pink flowers through summer, reaching a height of around 70cm
'Rosa Lee' is a clump-forming, herbaceous perennial, 50-75cm high, with five-lobed, toothed, green leaves, and umbels of pink flowers surrounded by pale silvery pink bracts, veined and tipped with green, from midsummer to late summer
'Pink Sensation' is a clump-forming, herbaceous perennial, 60cm high, with five-lobed, toothed, green leaves, and umbels 5cm across of pale pink flowers surrounded by pale pink bracts, veined and netted with green, from midsummer to late summer
'Rubra' is a clump-forming perennial up to 90cm high with deeply lobed, toothed, dark green leaves, dark red-green stems, and umbels of dark plum-coloured pincushion-like flowers surrounded by a ruff of dark red bracts from early to late summer
'Warren Hills' is a clump-forming, herbaceous perennial, up to 75cm high, with five-lobed, toothed, green leaves, and umbels of pale pink flowers surrounded by paler pink bracts, tipped and netted with green, in summer
'Star of Magic' is a clump-forming, herbaceous perennial, 60-75cm high, with five-lobed, toothed, leaves, mid-green edged and splashed with cream, and sometimes tinged with pink, and umbels of dark pink flowers surrounded by dark pink bracts in summer
'Large White' is a perennial that grows to 90cm tall, with white to greenish-white pin-cushion flowerheads opening in mid summer
'Ruby Wedding' is a perennial with a loose rosette of basal leaves and erect stems bearing deep purplish-red flower-heads in summer
'Hadspen Blood' reaches 70cm tall and has dark red flowers surrounded by very dark red bracts
'Moulin Rouge' is a cultivar with deep red pincushion flowers surrounded by a ruff of red bracts that appear from early to late summer. The leaves are deeply lobed and dark green
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