What does Overwatered Japanese maple look like?
While Japanese Maples can definitely appreciate wet soil especially during its first few years of being planted, over watering is definitely a common cause of decline. If your leaves are turning brown/black at the tips, this could be a sign of over watering.
Will my Japanese maple recover from leaf scorch?
As previously mentioned, the scorched leaves are a temporary condition caused by dry and hot weather, especially towards the end of long summer. Japanese Maples usually recover fine from leaf scorch and will produce beautiful fresh new leaves the following spring.
How do you treat brown spots on Japanese maples?
To manage and avoid tar spot, pick up debris around the tree regularly and keep it dry and spaced far enough from other plants that air can circulate. Cleanup is especially important in the fall. If you see a serious case of Japanese maple leaf spot, you can apply a fungicide to treat it.