Perhaps the tallest of the large flowering alliums, Giganteum is a horticultural Amazon that catches the eyes of even non-gardeners. Blossoms the size of softballs sway atop lofty stems in late spring, at about the time the Dutch iris bloom. Dramatic as a back of the border groupings, Giganteums also attract butterflies. We recommend planting these great big bulbs in an area sheltered from strong winds to protect the giant blooms.
For planting info see the "Allium Planting Guide" link below.