Ornamental Alliums are bulbous perennials that are grown for their spectacular, spherical, lavender coloured flower heads.
Strap-shaped, grey-green leaves form a clump of foliage in spring, then as the leaves begin to wither in mid-spring, stout flowering stems appear topped with huge, globular, lavender to silvery-purple flower heads. Each bloom is packed with individual star-shaped florets and as one dies back then new ones will continue to develop creating a long lasting display.
Then as an added benefit the flower heads will dry after blooming and remain ornamental in the garden well into summer.
Plants form dense, slowly-spreading clumps over time.