bulbs Allium giganteum Early to midsummer blooms. Densely packed 5–6" head of violet-purple florets opens atop a 3½–4' sturdy flower stalk. This giant needs shelter from strong winds. A spectacular cutflower; cut it short for a tabletop or long for a floor vase. Z4-9. 18-20cm bulbs.40-48" tall. ships in fall