Spiraea betulifolia ‘Tor’ Birch-Leaf Spiraea Description This birch-leaf Spirea is the pinnacle of adornment! A multitude of tightly packed, white flower clusters against a backdrop of iridescent green leaves. Exceptional purple autumn color adds to this plant's allure. Blooms mid to late spring. Sizes & Prices All Spiraea Characteristics Hardiness Zone: 3 Light requirements: Sun Height: 3' Spread: 4-5' Native: No Sizes & Prices Size: 18" Ht $49.98 Size: 24" Ht $54.98 Other Information Birch-Leaf Spiraea Spiraea betulifolia 'Tor' Zone: 3 Sun HT: 3'