Once the flowers and foliage die back in autumn, you'll need to head out into the garden for your annual hydrangea ...

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.

Abate said hydrangea flower buds form the year before they bloom, on old wood. But this year they were zapped by the extended winter, leaving many wonder where have all the hydrangeas have gone.

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.