With their large, blowsy white flowers and attractive foliage, climbing hydrangeas are an excellent climbing plant for covering a shady north or east facing wall or fence, or even the wall of a house. Hydrangea anomala subsp. petiolaris is the most common climbing hydrangea, with large white lacecap flowers in early summer and heart-shaped, dark green foliage that turns butter yellow in autumn. It’s deciduous, which means it loses its leaves in winter after turning yellow in autumn, but is hardy and easy to grow. The Royal Horticultural Society has given it its prestigious Award of Garden Merit (AGM).