I have pruned and not pruned my Nikko blue hydrangea, but it does not bloom no matter what. What should I do?
Big-Leafed Blue Nikko Hydrangea
Certified GKH Gardening Expert
This article has some suggestions on other things that may cause a hydrangea not to bloom:
It may be that it's not getting enough sun. My Hydrangeas like morning sun and afternoon shade. You could try fertilizing it if you haven't already.