Say the word "hydrangea" to gardeners, and most will picture those large, summertime globe-shaped blooms atop large-leafed shrubs. Often overlooked and just as spectacular is the climbing hydrangea, a fast-growing vine once established, capable of reaching 40 feet in height and six feet in width. Finely serrated, dark green ovate leaves provide a backdrop for fragrant white, flat-headed flowers (similar to lacecap blooms) in late spring to early summer, adding texture and brightness to shade gardens. Though meant to climb, this hydrangea can be grown in a container planter, and unsupported, will sprawl into a three to four foot mass.