My kwanzan cherry tree leaves are turning brown and wilted any suggestions?
Within the last several years Ornamental cherries, particularly Kwanzan cherry have been subject to a fungal disease called brown rot which causes the leaves to brown and wilt. This is a common disease that affects fruit trees (stone fruits) and requires a spray program for control. Fungicides need to be sprayed at bloom and every two weeks into the summer. The disease targets smaller branches and can cause dieback. It may then target larger branches.
We do not have a lot of information on the particular brown rot that infects the ornamental cherries as it is fairly new. It may help to have the tree pruned. Thinning out the tree canopy may help to reduce moisture which promotes fungal diseases. Prune in the summer or fall when the weather is dry to prevent spreading disease. Remove any dead branches.
You will have to decide if you want to spray in the future to prevent the disease as it is too late to treat the tree now.
Cherry trees in general are not long lived trees about 25-35 years old is their typical life span. If the trees are older than this it may not be worth the cost of treating the tree.