Spring Clean Up Q&A: How to prune hydrangeas and when
/Q: Should I cut back my hydrangea plants now?
A: First of all, you are not going to kill your hydrangea if you cut it back or prune it at the wrong time, but you will lose the blooms that you would have had this garden season. So we want to be mindful about when we are pruning, so that we enjoy the maximum number of blooms.
Second, prune-time depends which hydrangea bush you have.