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. These 25 Japanese maples are all great options, offering foliage ranging from red and yellow to green also featuring different growth habits and tree heights.A Japanese maple is a glorious specimen tree. While there are many ways to select a Japanese maple, leaf color is why most people plant this tree. Many popular cultivars produce the familiar red foliage, such as one of the most popular Japanese trees, 'Bloodgood.' But others provide brilliant green or gold tones-and even bicolor leaves. In zones 7–8, they can benefit from planting in partial shade or dappled sunlight to protect the leaves from leaf scorch in the summer heat. Japanese maples should be planted in full to partial sun and in well-drained soil. They are suitable for USDA hardiness zones 5a–8b, though a few can brave zone 4 if planted in protected locations. The many different kinds of Japanese maples include Acer palmatum, Acer japonicum, and Acer pictum they are all part of the Sapindaceae (soapberry) family. ‘Sango Kaku’ is prized as one of the prettiest Japanese maple trees for its changing foliage but also bright coral bark, which gives this tree its striking contrast all year round. The foliage offers striking color throughout the growing season, becoming even more beautiful with the fall color change. Several dwarf varieties stay small and can be trained as bonsai.Īlthough the tree blooms in spring, it's the palmate leaves with five-, seven-, or nine-toothed finger-like leaves that offer the real appeal. With over a thousand varieties, it is a smallish species, with mature heights of 4–30 feet, depending on the cultivar. Japanese maple tree varieties are prized for their delicate and colorful foliage throughout the growing season and autumn. The Spruce Home Improvement Review Board.
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