Q.What Is Wrong With The Leaves Of My ‘Improved Cayuga Viburnum” ?
My ‘Improved Cayuga Viburnum” has flowers, but the leaves look damaged. Any suggestions? Does the soil need amendments? Or is it an insect?

Certified GKH Gardening Expert
It does resemble a pH imbalance. Clay soils can have a high pH, sometimes. I would test for that, nutrient deficiencies, or drainage issues in soil. These articles will help:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/test-soil-for-pests-and-diseases.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/making-sure-soil-drains-well.htm
This article will help you with the general care of Viburnums:
https://www.gardeningknowhow.com/ornamental/shrubs/viburnum/viburnum-shrub.htm