[16][15][13], The Sicilian Zelkova Z. sicula, only discovered in 1991, is listed as an endangered species. Mature Japanese Zelkova. In winter the greybark elm should be protected from frost, especially when it is planted in a shallow bonsai container. Japanese zelkova tree has often been promoted as a substitute for the American elm (Ulmus americana), now largely eliminated as a landscape tree because of its susceptibility to Dutch elm disease.While the Japanese zelkova doesn't have quite the charm of the American elm, it is an attractive tree and well worth planting. [29] The wood is hard, used for making furniture. de Spoelberch, P. (1994). A few phylogenetic and biogeographical studies have been carried out on Zelkova,[26][8][10][27] but these studies had small sample sizes or weak representation of wild populations. Pistillate and hermaphrodite flowers are solitary, or rarely in clusters of two to four, in the upper leaf axils of young branchlets. Placement: The Japanese greybark elm likes a place in full sun during the growing season or, if the sunlight is very intense in your country, semi-shade during the hottest weeks. Find species-specific information on your tree. Zelkova serrata Figure 1. Tree Species Zelkova Serrata (Japanese Elm) The Zelkova Serrata, also known as Japanese Zelkova, Japanese Elm or Keyaki, is a species of the genus Zelkova native to Japan, Korea, Eastern China, and Taiwan.It is often grown as an ornamental tree and used in bonsai. The bark is smooth, dark brown. Repotting: Repot the zelkova every two or three years, old big trees less often, and prune the roots carefully. Highly sought after bonsai. An excellent shade tree reaching 12 – 15 m in height with a spreading crown to 10m when mature. However, extensive Pleistocene glaciation has confined the genus to its present range to the eastern Mediterranean islands and the Caucasus, and in eastern Asia where only local glaciation occurred. If you need help identifying your tree, try our Bonsai tree identification guide. Gregor Kozlowski, Joachim Gratzfeld et al. Zelkova is polygamous. We guarantee a careful packaging. Andrews, S. (1994). Zelkova has in fact been promoted in recent years as a substitute for American elm (Ulmus americana) because of its resistance to Dutch elm disease. It is also important to have a scarless trunk and a perfect nebari. ; and Zelkova sinica C. K. — Lozenets, Kurilo, Chukurovo in Sofia Region, Dospey in Samokov Region, Pernik, Pirin Mine in Blagoevgrad Region, Bobov Dol in Kyustendil Region; Zelkova praelonga Berger — Pirin Mine in Blagoevgrad Region. Zelkova (Japanese Elm) Care guide for the Zelkova Bonsai tree. Common Name: Elm - Japanese. After the leaves have fallen, carefully prune thick twigs and overly long shoots. Japanese Zelkova is a tough urban tree for residential shade and street plantings. Pests and diseases: The zelkova is hardly bothered by pests and diseases. ZELKOVA SERRATA Common Name: Japanese Gray-Bark Elm. Zelkova is closely related to elms, but it is resistant to Dutch elm disease. serrata in Japan and mainland eastern Asia, and Zelkova serrata var. The crown is shorter and more rounded than the American elm. Watering: Water the zelkova regularly and don't let the rootball dry out, but take care not to overwater the tree. It typically has a short trunk followed by many erect branches that continue upwards to create a round-topped head. This tree, native to Japan, Korea, and China, is probably the oldest Zelkova in Lancaster County. It aimed to assess the diversity within and among species using DNA from two cellular compartments that have different modes of inheritance and trace different histories. Compact. Quick ID. Tree of the year: Zelkova. Reasonably fast growing, good substitute for Ulmus Procera. Zelkova serrrata 'Japanese Elm Tree' Create your own bonsai tree with our pre-bonsai nursery stock. 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