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. The Basics of Hydrangea Pruning.
There are two simple rules of hydrangea pruning.
If it blooms on old wood, you prune after the blooms fade in the middle of summer or else wait until late winter or early spring.
And if it blooms on new wood, then late winter or early spring is the optimal time to prune. 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 Estimated Reading Time: 5 mins.
Apr 12, If you do it in the summer, the weather might be too hot and the sun too bright causing sun damage to the plant before its had chance to establish and get some root out into the soil. Mid-spring circumvents the risk of an unexpected cold bushtrim.buzzted Reading Time: 3 mins.
Pruning in late fall or early spring before new growth begins will bring new blooms all summer. Big Leaf and Oakleaf hydrangeas should be pruned no later than early fall, otherwise you may cut off buds preventing any blooms come summer. For these types of hydrangeas, it’s best to prune immediately after flowering. What time you prune depends on which of these varieties you are growing. 2 Prune old-wood hydrangeas after they finish blooming in summer and. Hydrangea paniculata (Pee Gee or Panicle Hydrangeas) Prune this Hydrangea in late winter to keep the plants from becoming overgrown and encourage more new growth, more flower buds, and larger blooms.
You can remove dead flowers, as soon as they become unattractive and clean up the overall shape of the plant.