Sapphire Beauty Dutch Iris 20 Bulbs - Multiply Rapidly - 8/9 cm Bulbs by Hirts: Bulbs; Iris What your getting: Bag of 20 Height: 20-24" tall Bloom Time: Early summer Bulb Spacing: 6 bulbs per sq. ft. USDA Hardiness Zones: 5, 6, 7, 8, 9, 10