Hydrangea serrata ‘Tuff Stuff AH-HA’ Mountain Hydrangea Description A new addition to the mountain hydrangea family. This cultivar boasts the largest florets and flowers of them all. Like other mountain hydrangeas, it will display slightly different colors based on soil acidity. Blooms on old and new wood. Characteristics Hardiness Zone: 5 Light requirements: Sun/Part Shade Height: 3' Spread: 3' Native: No Sizes & Prices Size: 15" Ht $34.98 Other Information All Hydrangea serrata Hydrangea serrata 'Blue Billow' Mountain Hydrangea Zone: 5 Sun/Part Shade HT: 3-4' Hydrangea serrata 'Tuff Stuff AH-HA' Mountain Hydrangea Zone: 5 Sun/Part Shade HT: 3'