No blooms on hydrangea
The first few years our hydrangeas (probably Big Leaf) bloomed profusely. The last three seasons produced many healthy leaves but no blooms. I tried cutting back to the ground, pruning back to the first visible leaf buds, and not pruning at all. Nothing helped. Any answers?
Improper pruning and excess nitrogen are the two most common issues for lack of flowers.
This article will help you.