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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.
'Orange Glory' is a robust perennial to 1.5m in height, with light green foliage and terminal umbels of red-tipped orange-brown flowers, the inner segments deep yellow, tipped with orange-brown
'Variegatum' is a deciduous tufted grass with characteristic swollen stem-bases, white-margined leaves and open panicles of oat-like flowers in late summer
'Falcon's Crest' is a strong, slowly spreading plant with erect foliage, to 80cm, and flower stems to 90cm, each with up to 4 flowers with eye-catching colouring. Standards are so heavily veined that they appear dark brown. Falls are circular, drooping, yellow with dark brown rays near the outer edges and a dark brown rim. Mid-summer
'Fairy Tails' is a deciduous, perennial grass to 1.2m tall, producing a relatively upright clump of greyish-green leaves, topped with arching, silvery-pink flowers that fade to buff, from mid-summer to the first frosts
I. korolkowii is a rhizomatous herbaceous perennial, 40-60cm high, with narrow, glaucous leaves and creamy-white flowers with maroon-brown veins on both standards and falls, maroon-brown blotches on the falls, and inconspicuous yellow beards, in early summer
S. nutans is a robust perennial grass forming a spreading clump of narrow, arching, blue-green leaves, with slender terminal panicles of yellow-brown spikelets in late summer and autumn
C. fulvida is a species from wet habitats in New Zealand. It has large, gracefully curving silver-brown flower panicles, pink-tinged when young, above the arching foliage
M. gale is a deciduous, suckering shrub with highly aromatic foliage. It bears clusters of yellow and brown catkins at the ends of the shoots in spring, followed by small, yellow-brown berries
L. ovatus forms a tuft of narrow, arching leaves, with slender stems bearing dense ovoid flower-heads, at first pale green, later pale buff to cream
S. x chelsonii has curved, partly decumbent pitchers to 45cm in length with narrow lids and red veins; flowers dark mahogany-red
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