How to Get Hydrangeas to Bloom
Plants are older, and I do not prune until new growth appears in spring. I add peat moss and fertilizer in spring. They are planted in shade with hostas and ferns. They have bloomed in the past years.
Certified GKH Gardening Expert
Most likly a harsh winter or a late frost killed the blossoms. This article should help you: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm