![]() The Japanese Red Maple is hardy in USDA Zones 5-8. Best leaf color in partial shade, although full sun can be tolerated. Mulch helps retain soil moisture and keeps roots protected. Japanese maples grow well on clay soils as long as the ground is sloped so that water does not accumulate in the soil. Be sure drainage is maintained, and never allow water to stand around the roots. More direct sun can be tolerated in the northern part of the range. Leaves can scorch in hot summer weather unless they are in some shade or irrigated during dry weather. It is a full sun or part shade lover, this plant is easily grown in moist, organically rich, slightly acidic, well-drained soils. Fall color is reddish and less striking than other Japanese Red Maple. The trunk is muscular-looking, picturesque, grey and show nicely when lighted at night. Leaves turn greenish red during hot weather in the southern part of its range. Its popularity is due mostly to the leaves, which stay red for most of the summer. this Japanese Red Maple is nicely suited for residential landscapes, particularly smaller yards. Reaching a maturity height and width between 15-20 ft. Proper annual pruning, cleaning up of fallen leaves and twigs, and yearly replacement of mulch will help prevent the infection and spread of these Japanese maple tree diseases.Regarded as one of the best Japanese Maples, the award-winning Acer palmatum is a small rounded tree of great beauty in all seasons. Again, mature Japanese maple trees will probably recover but young trees may not. Moist, sunken bruising on leaves is a sign of anthracnose. It sometimes affects only one side of the tree, leaving the other looking healthy and normal. It is a soil dwelling fungus with symptoms that include yellowing leaves that fall prematurely. Verticillium wilt is another common Japanese maple disease. A mild case of canker will resolve itself, but heavy infection will kill the tree. The most common Japanese maple diseases are caused by fungal infection. Milder cases can cause scarring.Ī strong spray of water and regular treatment with either chemical or organic pesticides will go a long way to prevent insect problems with Japanese maples. At worst, they can cause the death of branches or even the tree itself by girdling the limb with their tunnels. These pests drill into the bark and tunnel along the trunk and branches. Aphids suck plant sap from the tree and a large infestation can cause distortions in tree growth. Wilting leaves, or leaves that are curled and puckered, may be a sign of another common Japanese maple pest: aphids. ![]() They often produce a honeydew which attracts another Japanese maple problem, sooty mold. All of these pests present as tiny bumps or cottony dots on twigs and on leaves. ![]() While these Japanese maple pests can attack a tree of any age, they are usually found in young trees. Other Japanese maple pests are scale, mealybug, and mites. These leaf feeders can destroy the looks of a tree in a matter of weeks. The most common Japanese Maple pests are the Japanese beetles. There are several possible insect problems with Japanese maples. There are a few Japanese maple diseases and several insect problems with Japanese maples that you should be aware of to give your tree the care it needs. Its red, lacy leaves are a welcome addition to any garden, but they aren’t problem free. A Japanese maple is a glorious specimen tree.
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