Climbing HydrangeaGrown for its large (6 10"), flat white flowers in late June and July. Plant guru, Mike Dirr, says there simply is no better clinging vine. Plants hold onto solid wood or brick fences and walls, arbors, and trees with root like "holdfasts" there is no need to support the vine with tape or ties. These "holdfasts" are completely harmless to wood and brick surfaces. Leaves drop in winter and re emerge in early spring.