Jim Silva A. Hi Charlotte and Jim. Charlotte, let me address your issue first. Well, I can give you a couple of tips that should remedy the situation and have your hydrangeas blossoming in all their colorful splendor this spring. Adding lime to the soil will make it more alkaline and help you get those pink flowers. Now, on to Jim's pruning question.
Hydrangeas are low-maintenance and their pruning requirements are relatively simple.
As a general rule, you can cut the bush down to the desired height in late winter or early spring. Then, after the flowering has finished, remove the weakened or dead stems that stick out above the new growth. The new branches will be left for the next season, when you can begin the process again. Because I'm not sure what type of hydrangea you have, it's probably a good idea for you to check with the nursery where you purchased it to verify its variety. Based on the information you acquire, they may have additional pruning tips for you.