Most of the other hydrangeas should be pruned in summer, once they have finished blooming. Most of these bloom on what's called"old wood" - growth from the year before. If you prune them in early spring, you risk cuting off the dormant flower buds. By pruning right after the blooms have faded, you allow the plant time to set buds for the next year.
Sep 24, Hydrangeas that bloom on old growth should only be pruned after flowering. Others bloom on new growth and should be pruned before they wake up in spring or as they are going dormant in winter. Mophead and lacecap hydrangeas can be pruned in late winter or early shrublop.buzzted Reading Time: 5 mins.
These shrubs can be pruned in early spring, fall or winter but not when preparing to bloom in summer. They do not need to be pruned every year. However, they can be pruned to the ground every year once established to encourage vigorous new growth or pruned to one-third to one-half the height to form a tidier bush with smaller flowers. May 10, Prune the hydrangea to reduce its size. If your hydrangea has grown quite large, you can prune it in June or July (just after the blooming season) to contain it a bit.
Trim back the branches by 1/3 to the nearest joint. In most cases hydrangeas will grow back quite quickly, so you may not be able to maintain the smaller size for long%.
Apr 26, Pruning hydrangea bushes is not necessary unless the shrubs have become overgrown or unsightly.
You can safely remove spent blooms (deadhead) anytime. However, there are a couple deadheading tips to keep in mind for optimal results. Pruning Mophead, Lacecap, and Oakleaf Hydrangeas. Method I. Prune these hydrangeas only in the summer before August (to be safe). Some experts believe these hydrangeas may be pruned even into August, but this might be risky. The hydrangeas may already have set their bloom buds for the next year. Method I is for hydrangea types that bloom on old wood.