This is a fairly common problem, unfortunately. Go over the following article to see if any of the reasons for not blooming applies to you. If not, please write back and tell us how you are caring for the plant and whether it is in a pot or in-ground. A picture if often helpful. https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
Answered on July 12, 2019
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