Hydrangea, Climbing HydrangeaClimbing Hydrangea is a large woody deciduous vine with horizontal branching and attractive red brown exfoliating bark. The serrated dark green leaves have a cordate base and are a non showy yellow in fall. Flat topped lacecap clusters of fragrant white flowers bloom in late spring to early summer. Best bloom in partial sun and rich, moist well drained soils. Unsupported vines will sometimes sprawl as groundcover and form multiple 3 4' shrub like