Others, like the common bigleaf hydrangea with its large, showy flowers and traditional blue and pink rounded clusters, are native to China and Japan and came to the U.S. in the 1700s.

Oak-shaped leaves and lacey, conical flowers are features of this oak-leaf hydrangea blooming this June in Northeast Ohio. If it is a tall, clinging vine (up to 80 feet), it is climbing hydrangea.