So, if you decide to replant, ask nursery staff which cultivars have some resistance or, at the very least, avoid those cultivars that are the most susceptible. Plastic shelters have been as good as or better than chemical methods against the same disease on other crops.Judging from your photos, removing dead wood will disfigure your tree(s). Then, to, consider protecting from rain and frost in early spring or late fall. That produces a lot of late-season growth, which causes plants to be more sensitive to winter injury and thus more susceptible to bacteria. Maintain adequate spacing for good air circulation.Collect and discard any infected leaves that drop.Remove and destroy dead and/or blackened wood during dry weather.Instead, management relies on cultural practices, such as these: No chemicals are available for use by home gardeners. Frost damage, high nitrogen fertilization (especially late summer), and heavy rains favor bacterial invasion." Bacteria enter through wounds or natural openings. It spreads with windblown rain, insects, and pruning tools. overwinter on infected plant parts or as an epiphyte on healthy tissue. The following is excerpted from our official disease management handbook: Japanese maple cultivars such as Sango Kaku and Oshi Beni are highly susceptible. Most maples, especially Acer rubrum, are susceptible except sugar maples. This disease is challenging to manage if the maples are listed as susceptible. Irrigate well.Your maple trees are infected with Bacterial Leaf Spot and Dieback, caused by Pseudomonas syringae. Divide the fertilizer between the holes and tuck the pellets into them. Instead, bore holes around 6 inches (15 cm.) deep into the soil around the tree, about halfway between the main trunk and the drip line of the branches. If you want to use slow-release fertilizer pellets, don’t just scatter the Japanese maple fertilizer on the soil surface since this results in sporadic releases. What to use for Japanese maple feeding? Try a controlled release type fertilizer. High amounts of nitrogen results in excessively fast growth that will weaken the plant. Japanese maples look best if they grow at a slower speed. Do not apply high levels of nitrogen to the soil around your maples. Thrives in bright dappled shade in warmer regions, or in full sun in cooler regions. Deeply cut, pale green leaves display attractive red margins and turn a vibrant, golden yellow in fall. This moderate fertilization practice will keep your maples healthy. This beautiful small tree has brilliant red-coral bark on its young branches with color that intensifies in the winter. When you start fertilizing Japanese maples, your goal should be to maintain a constant low level of fertility. Alternatively, start Japanese maple feeding after the last freeze in spring. When you do start feeding Japanese maples, do so in late winter while the ground is still frozen. You’ll want to give the plants ample time to adapt to their new conditions. Once you plant the trees, wait at least until their second growing season before fertilizing Japanese maples. Don’t think that a newly transplanted tree needs feeding immediately. The first rule to keep in mind is not to start fertilizing Japanese maples too early. It’s important to apply fertilizer to plants at the appropriate time. However, a little Japanese maple fertilizer is enough, so exercise discretion in Japanese maple feeding. Protect your tree at least until it has established a mature root system.įertilizing Japanese maples is an important part of the nurturing process. Maple species are understory plants in the wild, and excess sun can be very wounding to your tree. Both strong winds and hot sun can stress or even kill a maple. Most of the trees thrive in a site that gets some sun in the morning but shade in the afternoon. Japanese maples require well-draining soil and will do poorly in clay or wet soil. The placement of your tree will determine how attractive and lush it will look and even how long it will live. It isn’t as picky as you might think, but it does have some definite preferences.įinding a good site for your Japanese maple is the single best thing you can do to keep that tree healthy. Japanese Maple Feeding and CareĪ Japanese maple brings such beautiful texture and color to your garden that you’ll want to take top care of the tree. If you want to learn when and how to fertilize a Japanese maple tree, read on. To keep your Japanese maple happy, you’ll need to site it correctly and apply fertilizer appropriately. They make eye-catching focal points for any backyard, and many cultivars delight you with fiery fall displays. Japanese maples are garden favorites with their graceful, slender trunks and delicate leaves.
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