Hydrangea pan. ‘Pink Diamond’ Treeform Treeform Hydrangea Description Pink flower clusters grace this small tree in late summer and fall. Flowers are great for drying. Prune in the spring to create a denser canopy and more flowers. May need staking while it is young to support the heavy canopy during full flower. Characteristics Hardiness Zone: 4 Light requirements: Sun/Part Shade Height: 8-10' Spread: 10' Native: No Sizes & Prices Size: 10 GALLON $199.98 Other Information All Hydrangea paniculata, Treeform Hydrangea pan. 'Grandiflora' Treeform Treeform Hydrangea Zone: 4 Sun/Part Shade HT: 8-10' Hydrangea pan. 'Pink Diamond' Treeform Treeform Hydrangea Zone: 4 Sun/Part Shade HT: 8-10'