I have a lot of leaves turning brown in patches. Help?
Brown Patches on My Leyland Cypress Trees
Certified GKH Gardening Expert
The browning patches that are in the image could simply be some winter damage, but could also be a more serious disease.
You will need to make further inspections of the branches and trunk of the tree to pinpoint the cause if it is a fungus or due to pests.
The links below will help you.