Genus Hydrangea Species macrophylla Cultivar 'Horwack' Pistachio Common Name Pistachio Next Generation Hydrangea Patent ID pp# 25577 Height 3 to 4 Feet Spread 3 to 4 Feet Habit Rounded, to somewhat mounded habit. Moderate growth rate. Zone 5 to 9 Culture Partial shade. Flower Wow, a wide range of colors! Pink, red, lime green. Begins blooming in mid summer. Rebloomer! Flower Color Pink, green Foliage Medium green. Deciduous. Categories: Deciduous Shrub Hydrangea Description The Next Generation Collection is a A Ball Ornamentals Exclusive.