Climbing hydrangea (Hydrangea anomala petiolaris) is a climbing, woody vine that bursts into bloom with stunning white flowers. Climbing hydrangea is a slow-starter, but once established it grows quickly and aggressively. Support structures should be strong, such as a wall or mature tree. Climbing hydrangea should never be pruned while juvenile and requires only minimal pruning in maturity. The more of the vine you cut, the fewer blooms you will have, so exercise restraint when pruning. Trim the climbing hydrangea after flowering.
Train the climbing hydrangea to a strong support structure. Once it becomes established, the aerial roots will cling to its support and are difficult to remove, so it's important to train it early.
Sterilize your pruning equipment by soaking tools in a solution of 1 part household disinfectant and 5 parts water.
Remove dead or damaged canes by cutting them back to healthy growth.
Cut multiple stems growing out of bounds with the loppers. Cut the stems back to where you want them on the support structure.