Check with your local nursery.
It depends on the type of hydrangea you have. Does yours bloom on old wood? Or new wood? These sites will help you out.
Hydrangea, is a beautiful plant that I've never had, so I have to give you info from the many videos we have! Good luck with your plants.
My name is Linda and I also have hydrangeas. We were told not to prune ours until it absolutely needed it. Some hydrangeas are best pruned in late fall, while others should be pruned in the summer. It depends on whether they bloom on old or new wood. If you look on the stalks of those that bloom on new wood, you will see the start of next year's flowers not too far down the stalk, next to a pair of leaves. That type should be pruned in the summer as soon as the new flowers start to fade. Here's an article with more information that should help you figure out which type of plant that you have. Wishing you the best!
Hello, In late winter or early spring, these shrubs can be cut all the way back to the ground. Smooth hydrangeas will produce much larger blooms if pruned hard like this each year, but many gardeners opt for smaller blooms on sturdier stems. To reduce flopping, leave a framework of old growth