Why do the tips of my Japanese maple go crusty. If your Japanese maple won’t leaf out, it’s very disappointing. Over-exposure to sun can result in brown leaves, a phenomenon also known as "leaf scorch." Irrigation or rainfall in spring allows the fungus to infect new leaves as they emerge from buds. I have a Japanese Maple in my back yard, in the past two years I have had wilting, curling leaves on half the tree. Maple leaf blister is a disease of maple leaves that displays symptoms somewhat similar to maple anthracnose. I enjoy its beautiful fall color and often photograph it. There is no saucer and it is sheltered by a wall. Curled Leaf Maple: Answer: Leaf Curled Maple. Caption: Frazzled leaves ruin the display of Japanese maples . I doubt it is weather variables (sun, water etc.) my maple tree’s leaves are curling, and looking like they are going into winter dormancy. Questions About Japanese Maple Trees. The fungi typically reside in the tree over the winter and begin assaulting the leaves of the Japanese maple in the spring. In some cases whole leaves can become entirely crispy and there may be some minor die-back of branches. However, most of these conditions are specific to the location of your Japanese maple which I assume you don’t want to change. This lace-leaf Japanese Maple has leaves that emerge orange-red in spring. Leaf curl is identifiable on newly sprouting Japanese maple leaves and twigs in the spring. Anthracnose is a group of related fungal leaf and stem diseases that infect shade trees. Leaves curling and drying up while other leaves changing colors. Proper water management is far more important than fertilizer or soil types”. Other fungi are less insidious. 1. More than likely it’s Verticillium Wilt. If the leaves of your Japanese maple have leaves that are wilting and turning yellow or brown, it might have Verticillium wilt. Few plants can equal the beauty and command of a Japanese Maple in the autumn landscape. One cultivar of Japanese maple has naturally curling leaves. These ornamental maples are prized for their foliage, diminutive size and value as a focal point for garden plantings. How long will it take to get the tree seedlings large enough to plant in my yard? It is often followed by the leaves curling and shrivelling. We have posted a neem oil spray recipe recently. 67% Upvoted. Japanese maple leaves can be spotted and the veins within the leaves can be blackened. When this happens, the new branches that sprout (" sucker ") up from the ground will have the genetic makeup of the original rootstock—which will be green, rather than red or purple. If planted in sun, the leaves will show more of a orange-red color. It seemed to be doing well up until the past month. Caption: Frazzled leaves ruin the display of Japanese maples This pathogen can cause die back of small branches. My son brought this home from school in the 2nd grade, some 35 years ago. However, the only way to be completely sure it isn't verticillium wilt is to have a sample tested at a diagnostic lab. On way to work, I pass a row of gorgeous trees in the fall. Q Why do Japanese maple (Acer palmatum) leaves sometimes frazzle?. Compared with maple anthracnose, the spots are more rounded in shape and contain small, raised blisters. It could indicate that the tree is not getting enough water. Or if the spots are more free-form, that could be anthracnose, another common leaf disease. Fungal spores appear on the leaves and they pucker in odd shapes that cause the leaf deformity making them curl. Perform this quick check to see if your tree is not getting enough water. If the leaves on the Japanese maple tree dry, curl or look scorched around the edges, it may not mean the tree is dying. 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