When and How to Prune a Very Large Hydrangea

Question

The bush provides beautiful blue flowers but is outgrowing its spot.

Answer 1

Hydrangea can take pretty heavy pruning, though you may lose blooming for a year. Go ahead and prune it back heavily and it will be fine.

This article will help you as well:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/prune-hydrangea-bushes-hydrangea-pruning-instructions.htm