Climbing Hydrangea (Hydrangea anomala petiolaris)

A fantastic plant, this climbing hydrangea thrives in some of the most shady, inhospitable areas of the garden.
 
Whilst slow to establish, it will eventually romp along a wall or fence, clinging by aerial roots. Its almost heart-shaped, dark green leaves turn yellow in autumn, and masses of showy, lacy, white flowerheads appear in late spring and early summer.