In some cases the leaves on a single branch will discolor and die, but do not fall from the tree. Verticillium Wilt is a disease that can attack Japanese maples. As a collector of Japanese maples for many years I’ve seen little to no evidence of this on any of my plants. This pathogen can cause die back of small branches. Japanese maple leaves can be spotted and the veins within the leaves can be blackened. This bacteria is considered opportunistic because it usually attacks plants that have already been damaged by frost or by other means. Pseudomonas syringae is a common bacteria that affects many woody plants, including Japanese Maples. Insects and Diseases that can Attack Japanese Maples After planting, if you really feel that you need to fertilize use something organic. Better to plant them in good rich soil that has a great deal of organic matter, such as composted cow manure worked into the soil before planting. They don’t like to over eat! Japanese Maples Do Not Like a Lot of Fertilizer! In other words, it’s best not to fertilize them at all. But given a choice water the roots and not the tops.įree: Download This FREE eBook, "The Gardener's Secret Handbook" Todayģ. This isn’t a serious problem and not one that I worry a lot about. The water droplets act as mini magnifying glasses and can leave burnt spots on the leaves. They don’t like wet hair! Japanese maples don’t like to have their leaves sprayed with water when the sun is out. When planted high like this your tree will need watered about twice a week, but check the soil near the roots and make sure it’s not soggy before you add more water.Ģ. That’s why I suggest planting only half the root ball in the ground, then building a raised bed around the part that is sticking out of the ground. Make sure you do not dig a hole that will become a bathtub that your plant can drown in. Keep in mind that the root ball is made up of very loose, porous soil that water can easily drain into. Then set the tree in the hole and fill around and over the root ball with good, rich topsoil. In heavy clay soil you should only dig the hole half as deep as the root ball on your tree. Many people do it wrong and their tree dies. If you have heavy clay soil that does not drain well you have to make some adjustments to how your tree is planted, but be careful not to make the wrong adjustments. They don’t like wet feet! In other words only plant them in good rich soil that drains well. But there are a few things you should know about them.ġ. For the most part they are usually care free plants that happily exist in just about any landscape. Contrary to what most people think, Japanese maples are pretty easy to raise and care for. In most cases that’s not the case at all. May be affected by horse chestnut scale, aphids, verticillium wilt.Japanese Maple Failure not Caused by DiseaseĪs soon as somebody has a Japanese maple, or any plant for that matter, that doesn’t look good they immediately think it’s being attacked by some dreaded disease.Fertilize in spring before the leaves emerge. If pruning is necessary, prune during the dormant season and avoid pruning in spring when the sap is running. Low maintenance, this plant needs little pruning.Perfect as a specimen plant in cottage gardens, city gardens, rock gardens, and containers.Leaf scorch can be caused by a lack of soil moisture or excessive exposure. Mulch helps retain soil moisture and keep roots cool. A full sun or part shade lover, this plant is easily grown in moist, organically rich, slightly acidic, well-drained soils.'Red Dragon' prefers full sun and tolerates frost, but needs protection from cold winds and summer drought. It is perfect for small gardens or containers. Well-branched, this Japanese Maple features an upright-pendulous habit and forms an elegant cascading mound. Emerging bright scarlet red in spring, the delicate foliage of ferny, lace-like leaves matures to dark burgundy in summer before finally changing to a spectacular crimson-red in fall. Noted for keeping its rich purple-red foliage color better than any other Laceleaf Japanese Maples, Acer palmatum 'Red Dragon' is a compact, slow-growing deciduous shrub with elegant dissected leaves reminiscent of the claws of a dragon.
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