Q.How To Prevent Further Drying Of The Sweet Cesnut’s Leaves?
I planted sweet chestnut last fall. It is now about 3 years old. It has been growing nicely, but in the last couple of weeks I have noticed that its leaves are drying up. Pictures are attached. Do you know what could be the cause and how to prevent further deterioration of the tree? Thanks in advance.

Certified GKH Gardening Expert
Unfortunately, your photos did not make it through. I am unable to see the damage. In the meantime, this article will help go over the most common diseases of Chestnut trees:
https://www.gardeningknowhow.com/edible/nut-trees/chestnut-trees/chestnut-tree-diseases.htm