The real answer is, it depends. It depends on the type of hydrangeas you have and whether they bloom on old or new wood. Here are a couple of general guidelines. 🌸 If you are going to deadhead and remove spent blooms, a general rule of thumb is to do it before August 1. After then, your plant will begin forming new buds for the following spring. If pruned after this, you jeopardize cutting off new growth that will give you beautiful blooms the next year. 🌸 If your hydrangea blooms on new wood,