Maples are deciduous trees, losing their leaves in the winter. The roots present near the surface can also cause damage to the concrete sidewalks, porches and nearby buildings. Japanese Maples are not large. There are many interesting Japanese maple tree facts, including how long these trees live. In contrast, compacted soil hinders root spread and may stunt growth. Make sure the planting hole is twice as large as the root ball, and ensure the roots are spread outward in the planting hole. A 2009 study by Susan Day and Eric Wiseman at Virginia Tech analyzed young trees less than 8 inches in diameter growing in unobstructed soil and found that the ratio of root radius to trunk diameter was about 38 to 1. This shallow root habit makes dwarf Japanese maples perfect for small container growing, especially if you prune the plant for bonsai purposes, as roots do not circle the container's base. Pam is the one who does most of the trimming of the plants in our landscape, especially the Japanese maples and she does a really good job. Even unpruned, the maple will rarely reach above 30 feet. A Japanese maple's roots do not stop at the end of the canopy branches' reach. Kinked and circling roots will shorten the Japanese maple lifespan. Autumn colour can be red, green, yellow or purple in a variety of leaf shapes and sizes. This ornamental tree grows to a height and spread of 15 to 25 feet, with a dense, mounded canopy that makes a lovely statement in the home landscape. Thanks for your assistance. Although some dwarf Japanese maple varieties can grow 6 feet tall, their root system is not a mirror image of the canopy. A good rule of thumb is to start at about 8 to 10 feet away from your home for small trees and scale up to account for the tree’s mature height and spread. © Copyright 2020 Hearst Communications, Inc. Is my Japanese maple dying? Maple roots are not highly competitive with other plants. The best you can do in this case is to nurture your Japanese maple with good soil, regular water and possible yearly injections to extend its life as long as possible. Ottawa, ON. Writing professionally since 2010, Amy Rodriguez cultivates successful cacti, succulents, bulbs, carnivorous plants and orchids at home. It also helps to replace the mulch every year to avoid the spread of infection. To maintain a healthy, horizontal root structure, plant your maple in a garden with ample soil spacing. In addition, dwarf Japanese maples prefer a shallow planting to avoid rot and pathogen infiltration at their graft connection point. Middle-aged Japanese Maple. Japanese maple seedlings cannot be transplanted from the ground during the growing season unless you can do so without damaging any roots. Silver Maples have a mature width between 40-60′ and their roots can extend beyond that. Hardy in U.S. Department of Agriculture plant hardiness zones 5 through 9, dwarf Japanese maples acclimate well to container habitats because of their shallow root system. Others, such as many conifers, have extensive root masses that spread far out from the base of the tree in search of resources. The roots extend radially from the trunk in all directions. Like eucalyptus and birch trees, the peeling bark delights children, who may harass the tree a little more than you like, unless you guard against it… Shaina Japanese Maple, Waterfall Japanese Maple, and Red Select Japanese Maple are good examples. Much of their appeal comes from their deep-lobed leaves that provide vivid colour in autumn. The sunset maple tree (Acer rubrum "Red Sunset") is a cultivar of red maple prized for … To prevent these diseases, prune your Japanese maple annually and clear up all the fallen twigs and leaves. In Japan, these trees can grow to 50 feet (15 m.) or more. The tree roots will continue to grow and will probably reappear in a few years. The height of an autumn blaze maple is approximately 40-50 feet at maturity, whereas the spread is about 30-40 feet. They can live to be over one hundred years old. The lifespan of Japanese maple trees mostly depends on care and environmental conditions. The root growth of most large maples extends 10–20 feet below the surface, less in areas with heavy clay soil or bedrock. The Japanese Maple forms varied appealing shapes that add character to your yard, and it also grows about 20 feet outward. If you grow them in a flat you can transplant them from the flat when really tiny into cell packs where they can later be slid out with no damage to the roots. After all, the wide-root oak tree that’s 70 feet tall needs much more room than the modest Japanese maple. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. I will soon be planting a Japanese Maple but I have concerns about the root system. Japanese maples have a bad reputation for developing roots that kink and circle around the root crown and lower stem, eventually choking the tree of its own life. These tiny cultivars, such as "Red Pygmy" or "Katsura," usually grow to a 3-foot height and spread if grown outdoors. The roots are well-behaved, so these Japanese Maples are perfect for accenting corners or crevices near foundation walls. In fact, a tree's roots can grow three times the spread of the branches within three years of being … Learn more in this article. Figure 1. Test your soil for soil diseases before you plant a prized Japanese maple. If you want to increase your Japanese maple tree lifespan, do not cut the roots. The lifespan of Japanese maple trees mostly depends on care and environmental conditions. Most grow to about four metres, though under ideal conditions some can reach 10m high. If you want to enhance the lifespan of Japanese maple trees, give them regular irrigation, provide an annual application of good quality compost, and install them in a location that provides partial shade and good drainage. Fast growing Trees tend to have shallow, aggressive roots which cause issues as they grow – specifically, Silver Maple roots have been known to lift sidewalks and break macadam driveways. Your maple cannot form a healthy root system without friable or loose soil. Whether planted in a container or garden, till ample organic matter into your soil to create a nutrient-rich environment.
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