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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.
'Trympostor' is a bulbous perennial with grey-green leaves and white flowers on stems around 20cm tall. The outer petals have prominent green markings and a reflexed habit, whilst the inner petals have a green inverted V-shaped mark around the petal notch
'Ketton' is a bulbous perennial, to 18cm tall, with erect, narrow, grey-green leaves and, in late winter, large, solitary, nodding, white flowers, to 3cm long, with pear-shaped outer segments and shorter inner ones. The inner segments have a pair of small green marks at the tips, sometimes joined by a fine line
G. plicatus is a bulbous perennial to 20cm in height, with broad, grey-bloomed, dark green pleated leaves and solitary white flowers 2.5cm in length from late winter, the inner segments marked green at apex, sometimes also at base
Scharlockii Group is a bulbous perennial of variable height, with narrow, grey-green leaves and solitary, nodding, fragrant, white flowers 2.5cm in length, emerging from a split spathe. The inner segments are marked with green at the tip, and the outer segments have variable amounts of green shading
'Warham' is a robust, bulbous perennial, to 20cm in height, with broad, grey-bloomed, dark green, pleated leaves. Solitary, white flowers, 2.5cm in length, appear from late winter; each inner segment with a large, green, half-oval mark at the tip
'Wasp' is a bulbous perennial, to 20cm in height, with erect, narrow, grey-green leaves and, in late winter, solitary, nodding, white flowers with long, narrow, outer segments. The short, inner segments have a large, green mark like a blurred X
'Magnet' is a bulbous perennial to 25cm in height, with narrow, glaucous leaves and solitary nodding white flowers, borne on slender, arching pedicels in late winter and early spring, the inner segments with V-shaped green mark
'Atkinsii' is a perennial to 25cm, with erect, glaucous leaves and solitary nodding white flowers, in late winter, with pear-shaped outer segments and shorter inner ones bearing a prominent green heart-shaped mark at the tip
Last-listed in the RHS Plant Finder in 2002
This plant is listed in the RHS Plant Finder book. At present our information about this plant is limited to a list of the nurseries that supply it. In time we will be adding more details including a description, growing information, advice and photographs.
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Listed in the RHS Plant Finder
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