How do I assure more blooming On my Nikko blue hydrangeas ?

Question

I’m afraid I may have cut them back at the wrong time-

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Answer 1

This article will help you in correctly pruning Hydrangea macrophylla: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/prune-hydrangea-bushes-hydrangea-pruning-instructions.htm