40 OAK LEAF HYDRANGEA Hydrangea Quercifolia Flower Shrub Bush Seeds BLOOM TIME: Spring - Summer HARDINESS ZONE: 5 - 9 PLANT HEIGHT: 72 - 96" . . . PLANT SPACING: 48 - 72" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average White to pink flowers with fall leaves of red, orange, and yellow. The Oak Leaf Hydrangea does indeed have leaves shaped like that of an oak tree. They are fragrant and make an excellent cut or dried flower.