Have two holly tree/bushes. They both have lost most of there leaves. We live in Eastern Kansas, Topeka. I’m assuming cold did it, I’ve not seen this before to thus extent. We had so much rain last year they were really lush. Do you think they will regrow there leaves?
Your Holly may have dropped leaves due to leaf scorch, but it also can be normal for some leaf drop in spring.
Make sure the plant is properly watered during dry spells.
2 to 3 inches of mulch will help with moisture levels, but make sure you keep the mulch away from the the base of the trunk by about 6 inches.
Inspect the leaves of the Holly to check for any other signs of disease or pests.
These articles have more information.