Q.What Is Wrong With My Hydrangea?
Many of the leaves have holes or tears in them near the stem and then the stem doesn’t hold them up. Others have brown spots and holes. Flower buds seem o.k. I don’t see any bugs.
Certified GKH Gardening Expert
Looks like pests. Sometimes you have to go out at night with a flashlight to see what are eating the leaves. Here is info about bugs and leaf spots.
http://www.uky.edu/Ag/Entomology/treepestguide/hydrangea.html
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/spots-on-hydrangea-leaves.htm
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/common-hydrangea-diseases.htm