How can I get my hydrangea bush to bloom

https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm

If you live in the north, there are complete books on how to get your hydrangeas to bloom. However, the first thing to think about is - do you you trim it to the ground each fall. If you do, that is why you have no flowers. The buds form on those branches for the next year so you need to leave those ugly sticks over the winter. Good luck - I've been fighting this battle too and am still learning.

I live in Texas. Mine is planted on the North side of my home and while it gets direct sunlight at times during the day, it is in a shaded (house overhang) area. I trim mine to the ground in late February and currently have a lovely display of flowers. Also do you fertilize your plant. Have you tested your soil. I give mine a little fish fertilizer that you can buy at the nursery. You just mix it with water and pour it on. But beware, it stinks and don't let your pets drink the water or get it on their feet.

When your hydrangea won’t bloom, it is because of the species of hydrangea you have planted. Some of them grow flowers off of new wood and some of them will grow flowers off of old wood. If your hydrangea won’t flower, then you need to figure out if this is the variety you have planted.

Read more at Gardening Know How: Reasons And Fixes For A Hydrangea Not Blooming https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm

Fertilize with fertilizer for acid loving plants. Mine did the same thing. They were starving. They are now blooming their little hearts out.

I'd try using Eleanor's VF-11, It works great on all of my flowering plants. I've gotten it at Home Depot