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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.
M. carmenae is a clustering cactus with globose stems to 8cm in height, the areoles with about 100 cream radial spines; white or pink-tinged flowers 1cm in length are borne towards the apex of each stem in spring and summer
A. victoriae-reginae is an evergreen perennial forming a rosette of thick, straight, mid-green, spine-tipped leaves to 30cm in length, with creamy-white flowers borne in narrow, erect or arching racemes to 4m in length
E. chihuahuaensis is an evergreen, perennial succulent forming rosettes of leaves to 10cm in diameter. The glaucous, pointed leaves have red markings near the tips and small yellow flowers are held on stems, up to 25cm tall, above the foliage in spring
M. pringlei is a cactus with solitary, sometimes branched, cylindric stems to 40cm in height, up to 12cm diameter, with stout yellow central spines, fine radials and rose-purple flowers 2cm in length
D. cooperi is a mat-forming, evergreen succulent with cylindrical light green leaves, up to 5cm long, and glossy, deep purplish-pink, daisy-like flowers, up to 5cm across, produced in mid- and late summer
A. filifera is an evergreen perennial to 45cm, with compact rosettes of stiff, pointed leaves edged with long white fibres. Greenish-white flowers are borne in spikes on erect stems to 2.5m
A. macroacantha is a clump-forming, evergreen succulent, to 60cm tall and wide, comprising rosettes of narrow, pale blue-green leaves, up to 25cm long, with small brown teeth and a terminal black spine. After at least 15 years, purple-tinged green flowers may be borne on a branched stem up to 2m tall
'Victor Reiter' has large stemless rosettes of thickly fleshy brownish-purple leaves tipped with red, and sparse red flowers
'Mediopicta Alba' is an evergreen perennial forming striking rosettes of spiny-edged, grey-green leaves, each with a creamy-white central stripe. Flowers seldom seen
'Wendy' is a bushy or slightly pendent, evergreen perennial to 30cm, with succulent, ovate leaves and panicles of nodding, urn-shaped purplish-pink flowers 3cm in length, tipped with pale yellow, borne from late winter
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