By far the largest flowers of any Allium! Globemaster is the largest of the fall planted ornamental onions with huge dense globes of purple starry flowers with a metallic sheen. The floral globes start out 4-5″ across, and with blooming grow in size over several weeks. Under good conditions, the bloom heads can exceed 11″. Best grown in well-drained soil in full sun and sheltered from strong winds. Leaves will wither and disappear from the garden shortly after bloom. An excellent cut flower for both fresh and dried flower arrangements.