Ornamental onion (Allium) 'Firmament'
Allium atropurpureum and Allium cristophii. Beautiful Allium with strong stem, greygreen leaves and flowerhead that is only two-thirds of
the sphere, about 10-12 cm wide. It is packed with star-shaped, dark silvery purple flowers, each flower being comprised of dark purple florets
adorned with shimmering silver anthers. It remains ornamental in the garden well into summer. Good cut flower in fresh and dried arrangements.
Favorite of bees, butterflies and other pollinators.
Winterhardy perennial bulb
Height 60-90 cm
Width 30-60 cm
Spacing 20 cm
Site sunny, medium moisture, well drained, rich, chalky, sandy soil