What causes this, and what can be done to help fix this problem?
My Japanese Maple Leaves Are Turning Brown and Crumbling
Certified GKH Gardening Expert
There is many things that can cause this. The first culprit is normally fungus. You can treat fungicide for this. Pests are another common cause. A pesticide will manage this. It could also be under watering, over watering, root rot or a few other things. Can you send us the way the leaves look before they turn brow? This will help us better pinpoint what the issue is.