Spider mites can be a problem in hot, dry summers. Semi-dwarf cultivar great for tight urban spaces and under powerlines. Bark is smooth and gray in youth, and reveals a rusty-brown color with age. Selecting Trees Choosing the right tree for your landscape Choosing the Right Tree for Your Landscape Read the following information carefully before making a choice. Search on zelkova disease, wooly elm aphid, common nursery pests, and phytophera sem-rot to access materials that may be helpful in identifying your problem as well as treatments you can use to rid the tree of the problem.Access these materials at pnwhandbooks.org. It stands beautifully without creating any hindrance for the people or equipment to pass underneath. Tolerant of cold (to -20°F), drought, humidity, wind, compacted soils, and pollution. A native of Japan, Taiwan and eastern China, Japanese zelkova wins gardeners’ hearts with its graceful shape, dense foliage and attractive bark. Conclusion. A Zelkova Tree is a special plant and only the exact plant will have the proper shape, disease resistance and fall color. Fast growth rate. Popular for its short trunk, widespread foliage, and the beautiful reddish color in the fall. It is very difficult from your one small photo to see the actual twig damage that is occurring.The phytophera stem-rot usually forms cankers on the twigs or branches and actually kills a section of the branch or twig tissue, which then causes the rest of the twig to die.It usually does not affect the leaves, however. Phloem necrosis, wilts and cankers may occur. Best wishes for rooting out the culprits! Either of these pests flies in spring or overwinters on the tree and hatches out in spring. Zelkova is a genus of six species of deciduous trees in the elm family Ulmaceae, native to southern Europe, and southwest and eastern Asia. Please see the attached photo of what looks like some form of rust or scale on my eight year old zelkova serrata that appears to be the likely cause of some leaf and twig die back on the lower story of the tree. These trees need up to 6 hours of bright sun exposure and the same 6 hours for low sunlight or shady atmosphere. Indeed, the insects on the twig appear to be soft scale insects. Short internodes, fine textured foliage, and a tidy growth habit promise a low maintenance city tree. The trees are preferably grown in parks, street sideways, parking lots, domestic and official lawns, Bonsai, and Buffer strips. It is noted for its graceful shape, clean foliage, attractive bark and resistance to Dutch elm disease. The Zelkova Serrata Green Vase is narrower as compared to all other cultivars. This Japanese Zelkova is a narrower variety, usually 15 to 20 feet in width, and turns yellow as the autumn arrives. Either can cause twig die-back and ultimately leaf death. Photo Courtesy J. Frank Schmidt & Son Co. by Michelle Sutton, Taking Root Editor The Society of Municipal Arborists (SMA) has voted Zelkova serrata ‘Musashino’ the 2016 Urban Tree of the Year. It is an ideal shape for street plantings under utility lines. Ask an Expert is made up of groups and individual experts. The trees are deep-rooted. Zelkova Tree Scientific Name: Zelkova serrata. 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Frank Schmidt Nursery in Boring Oregon, this zelkova cultivar is touted as being an excellent choice for use beneath power lines as it attains height of 24’ and a spread of 35’. Compact, dense, and semi-dwarf, this is the perfect little tree for tight urban spaces. Once you’re prepared to make an informed decision for your particular needs, select … Selecting Trees Read More » There are two likely culprits that could be affecting your zelkova tree: a phytophera disease organism or a wooly elm aphid. It has a spreading, generally upright branching, vase-shaped habit. Due to its wide upper umbrella, the trees make good shady trees. Fast growth rate. These are easy to handle and are quick growers. Zelkova trees are also called “Keaki”. The leaf margins are sharply serrated. This is the shortest of all other varieties. Related to Elm Trees, but very resistant to Dutch Elm disease, it has gotten much more popular in this country since the arrival of that devastating disease many years ago. The soil preference during the growth phase is deeply moist and well-drained soil. The short height and single stem structure make them a good choice to grow without being an obstacle in the pathway of walking people underneath and the wires above them. Foliage View. This is popular due to its smaller height and a wide umbrella-like structure. Grows to a height of 24ft. The appearance in fall is prettiest of all other varieties of the Zelkova. The website, from Ohio state University, also mentions possible treatments to rid the tree of the problem. Native to Eastern Asia, Japan. Zelkova serrata 'Green Vase' A fast-growing, medium-sized, deciduous tree. There are two likely culprits that could be affecting your zelkova tree: a phytophera disease organism or a wooly elm aphid. These are usually 25 feet tall and 20 feet wide. Translation. The Wireless Zelkova is selected for its low height and broad spreading shape. Zelkova Tree Facts and Info. It must be produced directly from trees absolutely known to be right. The tree is shorter, so it occupies lesser space and a good choice for low spaced regions, parks, and even domestic gardens. The Wireless Zelkova is selected for its low height and broad spreading shape. This allows a firm and supported structure of the tree. The clinic is open Monday through Friday, 10 to 2. Zelkova serrata ‘Schmidtlow’: Growing zones 5-8. Zelkova is closely related to elms, but it is resistant to Dutch elm disease. This fast-growing rate also adds to the reasons for its popularity. Summer foliage appears brighter green than typical Zelkova. It is an ideal shape for street plantings under utility lines. Green leaves turn yellow, copper, orange or deep red to purplish-red in fall, putting on a showy display. The green summer foliage turns into shades of bronze in autumn. This tree remains lower than the electricity lines and wires in modern societies so it is commonly grown in streets and pathways to look beautiful without hindering the wires. Our trees are grown by grafting stems from selected trees with the best qualities onto the roots of seedling trees. Japanese Zelkova Tree Facts. The tree is single-stemmed from the base which means that the branches start growing in the upper portion. Bark is distinctive, predominantly in shades of yellows and light greys and has a flaky appearance revealing additional textures and tones of orange, brown and pink. The branches must remain lesser than half the diameter of the trunk. Here is some detailed information on the zelkova tree. Somewhat flat-topped at maturity. Popular for its short trunk, widespread foliage, and the beautiful reddish color in the fall. Find Wireless Zelkova (Zelkova serrata 'Schmidtlow') in Salt Lake City, Utah (UT) at Millcreek Gardens (Japanese Zelkova) Your Favorite Garden Center Since 1955 (801) 487-4131 Young trees have lenticels on beautiful reddish-brown bark. Zelkova serrata Wireless = 'Schmidtlow' RHS Plants for Pollinators plants This plant will provide nectar and pollen for bees and the many other types of pollinating insects. The Japanese Zelkova is a good street and shade tree that has an appealing vase-shaped form with a rounded crown. Zelkova serrata 'Village Green' - more round-vased at maturity, to 45' tall by 40' wide, with wine-red fall color NOTES. See our website for more information. Jean suggests you view the following website about "Calico scale" to compare both photos and description of the insects on your tree. Please take a sample of what appear to be insects on the twig, along with some dead twigs and leaves to the plant clinic at the OSU Extension office at 569 Hanley Road (Rte 238), Central Point.They can examine the twig and leaves and insects under a microscope for a definite identification. Hope you are still tuned in. Zelkova serrata 'Schmidtlow' – Single-stem Wireless Zelkova. It is a great tree for smaller yards or under electrical lines. The winter turns the foliage into reddish shades. The narrow upright habit of ‘Musashino’ zelkova lends itself to many uses. You can also consult the Pacific Northwest Handbook on Insects and the one on Disease. The Zelkova Serrata Wireless: One famous Zelkova is the Wireless Zelkova which is a shorter variety and a mature tree grows up to 25 feet in height and spreads in a vase-like shape of about 35 feet in width. The wireless Zelkova are low maintenance plants. 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