- Name: Star Of Persia Allium - Other Common Names: Star Of Persia / Persian Onion / Giant Christophii Allium - Scientific Name: Allium Christophii - Color: Amethyst Purple With A Silvery Shimmer - Plant Seeds: Fall / Cold Stratify / Indoors Weeks Before Last Frost / Outdoors After Danger Of Frost - Bloom Time: Late Spring - Early Summer - Hardiness Zone: 3 - 8 - Plant Height: 12 - 24" - Plant Spacing: 10 - 12" - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 20 Seeds - Other: More Info Coming Soon.