Two hydrangea species are considered native for U.S. East Coast and suitable for U.S.D.A Hardiness Zones 5-7. They are: H. quercifolia (oakleaf hydrangea) and, H. arborescens (smooth or wild hydrangea ...

Each variety has unique blooms, leaves, forms, and a range of sizes ... in water needs is the bigleaf hydrangea, which has the highest water need, and the oakleaf, which has the lowest.