Wildlife Habitat Programs and Consultation, Alternate, simple, double-toothed with unequal leaf bases. The Princeton elm exhibits good resistance to Dutch elm disease (DED) and demonstrates resistance to elm beetles as well. Foliage: Alternate, Simple, 3 – 6” long … Even though Dutch elm disease has killed most of the large elm in Iowa, American elm is still a component of woodlands in the state. The American elm is an extremely hardy tree that can withstand winter temperatures as low as −42 °C (−44 °F). For more drake elm tree information and details on caring for drake elm trees… While individual trees can produce fruit, they are rarely viable. ‘Jefferson’ elm is hardy in zones 5-7. The leaves of American elm are alternate in arrangement, oval, sharp pointed with double-toothed margins, and have prominent midrib and lateral veins. By taxa, trunk diameter growth ranged from a low, by ‘JFS Bieberich’ elm (0.7 cm/year), to … So, only use this data as a very rough estimate of a tree's … The wood of Americana elm is light in color, heavy, hard, strong and tough with interlocked grain. The height and circumference measurements listed here are for the largest-known American elm tree in Georgia. Sprinkle a granular fertilizer in the root zone each fall, using a ratio of 5-10-5 or 5-10-10. Several mail order nurseries have them available. Once a strong crotch has developed, prune off all branches below the crotch. Selected for its straight trunk and vigorous growth rate, the Princeton Elm has stood the test of time since 1922 when it was first cultivated. No stratification period is needed. It is one of the most tolerant and adaptable of the American elms, growing well in frigid zone 3 and has proven to also do well as far north as zone 2, as well as dry regions to zone 9 and wet regions. Most of the large trees are gone, except for a few vintage survivors which have managed to escape the disease. The size of … Trunk Diameter: 2 ft … Plant your Princeton Elm this year. Insignificant flowers appear in early spring just before the leaves open. 339 Science II Tolerance to road deicing salt makes this tree an excellent candidate for street and boulevard trees, however shallow roots may displace sidewalks. Branches rise through the crown, then bend in a sweeping manner toward the ground. Although sometimes difficult to find, disease resistant specimens are available through cloning and hybridizing. It’s crown exhibits the classic vase shape, is dense and symmetrical with upright branches. The winter buds (terminal bud is absent) are small, smooth, reddish brown to Gray in color, with 6 to 10 scales. A U … 'Valley Forge' American Elm, Ulmus americana — After 20 years of testing by the U.S. National Arboretum, ‘Valley Forge’ has shown a 96 percent survival rate to Dutch elm disease. The Princeton was first cultivated in 1922 and its survival rate has been impressive among the early trees planted in its first decade; few new elm species meet its track record. These blooms are followed by green, wafer-like seedpods which m… Trees in areas unaffected by Dutch elm disease(DED) can live for several hundred years. Several mail order nurseries have them available. A prime example of the species was the Sauble Elm, w… Copyright © 2020 Iowa State University of Science and Technology. If pruned diligently in the first ten years, a strong structure and vase shape should maintain itself. Jefferson American Elm … Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America, naturally occurring from Nova Scotia west to Alberta and Montana, and south to Florida and central Texas. Small 1/2-1” round green seed pods follow, maturing quickly and eventually the wafer like pod turns dry brown. Croix' is a recent (2008) selection cloned from a large tree growing at Afton, St. Paul, which has displayed a high resistance to Dutch elm disease (DED). American Elm Fruit - Photos by Paul Wray, Iowa State University, American Elm Twig - Photo by Paul Wray, Iowa State University, American Elm Bark - Photo by Paul Wray, Iowa State University, Agriculture and Natural Resources Extension, Iowa State University Extension and Outreach, ISU Extension and Outreach As with the ‘American Elm’, crotch and structure weakness can be strengthened with pruning when young. It begins to produce seed at a fairly young age before the individual tree is susceptible or dies from Dutch elm disease. Growing 3-6 feet each year once established, you’ll have a classic American shade tree in your yard in no time at all. The ‘American Elm’ form is preserved in this cultivar with a broad vase shape and upright branches giving way to arching branchlets. Growth Rate: Fast. Maintaining an elm’s good health is essential. This large, fast-growing tree is tolerant of many adverse site conditions. American Elm is also known as White Elm, Water Elm, Soft Elm, Gray Elm, American Weeping Elm, Swamp Elm or Florida Elm. The species is tolerant of a wide range of soils, and of ponding, but is the least shade-tolerant of the North American elms. The trunk will naturally divide into several large ascending limbs, producing gracefully drooping branchlets. Some of these resistant varieties are now becoming commercial available for use in the urban landscape. The bark on mature trees is light to dark gray, irregularly ridged with deep furrows. In early spring, before the new leaves unfold, the rather inconspicuous, small, green flowers appear on pendulous stalks. It was used for veneer, boxes, crates, barrel staves, and furniture parts. An extremely hardy and adaptable shade tree with an upright vase-shaped habit of growth and a very dense branching structure; this tree is probably the best choice for modern landscapes due to its high D.E.D resistance; a classic appearance. Pruning when young will help to develop a stronger structure. Elms grow at a moderate rate. Planting & Care. It grows quickly, reaching about 25 feet tall with a crown spread of 15 feet within 20 years. ‘Princeton’s’ disease tolerance is comparable to ‘Valley Forge’, showing moderate to high resistance to Dutch Elm disease as well as elm leaf beetle. ‘Valley Forge’ grows quickly, to 26’ and a 30’ crown spread in twelve years. ‘New Harmony’ is a pure ‘American Elm’ cultivar developed from seedling and shows nearly as high a resistance to Dutch Elm disease as ‘Valley Forge’, matching even the Asian elm to resistance. Trunk diameter growth by location ranged from 0.5 cm/year (Colorado, U.S.) to more than 2.0 cm/year (Iowa, U.S.). ... Growth Rate This tree grows at a fast rate… The trees grows quickly, once established will grow as much as 3 feet per year. Prairie Expedition – A 2004 North Dakota State University selection. A large shade tree with the desirable classic Elm vase shape. - Medium growth rate. Also Known as: Eastern larch, red larch, hackmatack, black larch, American larch: Tree Type: Coniferous and deciduous: Identification: Size: 33-66 ft in height (10-20 m). The small green flowers appear early in the spring before the leaves expand; the spring maturing seeds are a 1-seeded samara about 1/2 inch in diameter with a deep notch extending almost to the seed cavity. Sprinkle a granular fertilizer in the root zone each fall, using a ratio of 5-10-5 or 5-10-10. When used as a street tree, shallow roots may displace sidewalks. The American Elm has a fast growth rate once established; between 3 and 5 feet a year of new growth once established. Elms are adaptable to adverse soil conditions. ALLEE was cloned from a tree … It is still being tested and has shown outstanding resistance to Dutch Elm Disease. The biggest lesson learned from the devastation of Dutch elm disease is the importance of having a variety of trees along streets, in parks, and in home landscapes so that no disease or pest that may arrive can kill a large proportion of the trees. - Grows 4-6 feet per year. As with the American elms above, monitor branching habit and prune accordingly when young to promote strong crotch and structure, feed and mulch to maintain health as also noted above. The American Elm is very well suited to cold climates, and is very tolerant of difficult conditions including drought, compacted soil, poor drainage and air pollution, and has a good tolerance to soil salt. If fruit production is a concern, plant American Elm cultivars like Valley Forge Elm individually to avoid cross pollination. Also prune off all branches at any level that grows at a wide angle, preserving only upright growing branches. This tree is located on private property. Elms transplant and establish fairly easily, ideally plant in rich soil with a pH of 6 or 7, full sun, and regularly water deeply until well established. If pruned diligently in the first ten years, a strong structure and vase shape should maintain itself. ‘Jefferson’ grows in the classic American elm vase shape reaching nearly 70’ tall. Form (Shape): Umbrella-like form which typifies American elm. Noteworthy Characteristics. The Princeton Elm is … Mature Shape: Upright, spreading, and vase-shaped canopy. The American elm was the most popular tree … Soil Preference:  Adaptable to poor soil conditions and tolerates road salt. The trees … American Elm Flowers - Photos by Paul Wray, Iowa State University. Elms transplant and establish fairly easily, ideally plant in rich soil with a pH of 6 or 7, full sun, and regularly water deeply until well established. It is a very adaptable tree that easily tolerates urban conditions and has good resistance to diseases and insects. It grows to a uniform vase shape with upright branches and rich green foliage that turns yellow in the fall. Its growth rate … Also prune off all branches at any level that grows at a wide angle, preserving only upright growing branches. Use a bark mulch (wood chip mulches absorb soil nitrogen) and do not smother the base of the trunk with deep mulch. Communities for many years expended great efforts on surveys, detection, and sanitation programs, treatments to prevent root-graft transmission, and treatments with systemic fungicides to save or prolong the life the elms. A graceful tree that forms a rounded canopy with arching branches. Harsh pollution does not bother ‘Princeton’ other than sulfur dioxide pollution, making it an excellent choice in cities. Moisture:  Average moisture needs, with high drought tolerance, Foliage:  Full dense canopy with lustrous dark green leaves, turning yellow in fall, Foliage:  Dark glossy green, turning yellow in fall, Foliage:  Dark green large leathery leaves, turning yellow in fall. The flower buds are larger and often rounder than the leaf buds. American elm is a component of most woodlands in Iowa, although most of them will never reach sawlog size before dying. This plant … A ‘Princeton’ elm tree will live well over 150 years. Elms transplant and establish fairly easily, ideally plant in rich soil with a pH of 6 or 7, full sun, and regularly water deeply until well established. ‘Valley Forge’ like the ‘American Elm’, is very adaptable to adverse climate conditions that can sometimes be fatal to oak, maple and other popular trees. Birds and wildlife enjoy the seeds, but large amounts are sometimes produced causing a mess on flat hard surfaces. 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