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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:
'Rotstrahlbusch' is an upright, clump-forming perennial growing to 140cm tall. The green leaves, to 10mm wide, begin acquiring reddish tones in mid-summer before turning a deep burgundy red in autumn and fading to a tan colour in winter. The leaves are topped with airy clouds of pink-tinged flower panicles in mid-summer
'Warrior' is a deciduous perennial grass forming a clump of flat, linear leaves turning yellow in autumn, and large purple flowering panicles
'Heavy Metal' is a rhizomatous perennial grass forming clumps of upright metallic blue-grey leaves, turning yellow in autumn. Broad, diffuse, weeping panicles to 50cm long of tiny purple-green spikelets in early autumn
'Shenandoah' is a deciduous, clump-forming perennial grass, to 90cm in height, distinguished by its steely blue-green leaf colour, which takes on tones of violet, purple, burgundy and wine red in late summer. Forms stiff, dense clumps which persist through winter. Flower spikelets tiny, purplish, held in large open panicles, to 105cm
'Prairie Sky' is a deciduous perennial grass to 1.5m in height with flat, narrow lance-shaped, blue-green leaves from spring to summer, turning orange-yellow in autumn. Drooping branched panicles of small blue-green spikelets are borne in early autumn
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