Harlequin Hydrangea - Huge, 9-in. flowers in stunning all-out bloom throughout summer. Full and fluffy, they load the foliage—a glorious display of color. Branches bow under the sheer weight of the blossoms. Adaptable size for landscaping—grows 3-5 ft. tall. Best planted in full sun to partial shade. Potted plants. Zones 5-9.