Older plants can grow to … Vines of Chinese wisteria grow in a counter-clockwise direction (as do those of our native wisteria). Japanese wisteria is found invasive in the mid-Atlantic and southeastern U.S., from New York to Florida and west to Texas. (25.4 cm) in diameter, with smooth, gray-brown bark. It's often not a good idea to plant your wisteria on a house next to a door. Japanese wisteria vines grow clockwise. Kaufman, Sylvan Ramsey & Wallace Kaufman. Invasive Species: Wisteria sinensis, Chinese Wisteria. Leaves are alternate along the stem. They invade forest edges, roadsides, and ditches. 2002. Common Name: Chinese Wisteria, Japanese Wisteria Scientific Name: Wisteria sinensis, Wisteria floribunda Identification: Chinese and Japanese Wisteria are deciduous climbing woody vines that may reach 70 feet in length. Genetic analyses have shown that most naturalized plants are hybrids of Chinese and Japanese wisteria. Review of risks should be undertaken before selecting this vine for planting sites. Chinese Wisteria/Japanese Wisteria Destroys Native Wildlife Habitats This vine grows very rapidly, reaching up to 70 feet with 15 inch trunks. This plant is an invasive species in North Carolina Description. The stems are slender, brown and densely pubescent when young, becoming hairless with age. Leaves are compound, about 1 foot long, with 7-13 leaflets on Chinese wisteria and 13-19 on the Japanese variety. What to plant instead: American wisteria (Wisteria frutescens), trumpet honeysuckle (Lonicera sempervirens), Compiled by Christa Carignan, reviewed by Debra Ricigliano, University of Maryland Extension, 5/2018. Subscribe to our website! Most gardeners are unaware of the wide range of characteristics offered by Wisteria species and their cultivars in terms of bloom season, fragrance, length of flower clusters (racemes), flower colors, fall foliage. Found extensively throughout the eastern U.S., Chinese wisteria has been reported to be invasive in at least 19 states from Massachusetts to Illinois south to Texas. Japanese wisteria can girdle and kill trees and choke out the light in a forest setting. 2007. The problem with wisteria lies in its growth habit. Find where this species is invasive in the United States. Wisteria is sold in garden centers and nurseries and can be found in numerous home gardens across the country. Fish & Wildlife Service, Washington, DC. It is less invasive than its … These species of wisteria can grow 20-30 feet in just one summer, and are known — and often prized — for their voluptuous clusters of purple blossoms. Both types of wisteria, however, are considered a voraciously invasive species because the vines can quickly kill any live support system they are growing on. American wisteria is less invasive than either the Japanese or Chinese varieties and bears its flowers in short clusters up to six inches long. Vines climb trees, shrubs and manmade structures. Chinese and Japanese isteria may be difficult to distinguish due to hybridization. Other names for … This means that retailers must post a conspicuous sign indicating the plants’ invasiveness, and a person may not provide landscaping services to plant or supply for planting a Tier 2 invasive plant unless the person provides to customers a list of Tier 2 invasive plants. Chinese and Japanese wisterias are hardy and aggressive, capable of forming thickets so dense that little else grows. Although it may be slow to establish, Japanese Wisteria is aggressive and invasive in North Carolina, due to its rampant growth and rooting surface runners. Photo: Chris Evans, University of Illinois, Bugwood.org. However, in some states, they are considered an invasive species. Although both are invasive and difficult to control or eradicate, Chinese is worse. Japanese Wisteria Wisteria floribunda is Naturalized in Texas and other States and is considered an invasive plant in Texas. Flowers: Wisteria flowers are dangling and showy, blue-violet, and are borne on racemes. REC, Lower Eastern Shore American Wisteria. Vines of Chinese wisteria grow in a counter-clockwise direction (as do those of our native wisteria). The vine has the ability to change the structure of a forest by killing trees and altering the light availability to the forest floor. Wisteria floribunda can displace native vegetation and kill trees and shrubs by girdling them. Trailing, blue flowers form in long racemes in May and June. By Lauren Northup. Wisteria prefers full sun, but established vines will persist and reproduce in partial shade. Native alternatives for Chinese and Japanese Wisteria American Wisteria (Wisteria frutescens), native from Virginia to Missouri and south to Florida and Texas, is a clockwise twining deciduous woody vine that grows to 40 feet or more. Graphics: Marilyn Thomson In addition to writers & photographers credited through bylines (Mary Free, Judy Funderburk, Elaine Mills, Christa Watters & Susan Wilhelm), It twines upwards in a counter-clockwise direction. Unfortunately, they are now reported as invasive in forested areas throughout the Mid-Atlantic and Southeast, including Northern Virginia. Because of this rapid growth and dense shade, native canopy trees, understory trees, and shrubs can be smothered or killed beneath the heavy weight of this invasive vine. Japanese wisteria is a beautiful vine in flower, but it is an aggressive grower and is considered invasive in some areas, especially in the southern United States. Webmaster: Elena Rodriguez. Wisteria is in the pea/bean family. Wisteria is a genus of about five to seven species of deciduous, … Japanese & Chinese Wisteria Posted on May 4, 2020 by MGNV Webmaster These similar-looking exotic species were introduced from China in 1816 and Japan around 1830 Racemes are 4 to 20 inches (10-50 cm) long and 3 to 4 inches (7-10 cm) wide. REC, Glyphosate (Roundup®) Information and Alternatives for Weed Management, (PDF) Control of Invasive Non-Native Plants, Plant Invaders of Mid-Atlantic Natural Areas, Maryland Invasive Plants Prevention and Control. Japanese and Chinese wisteria will often produce a secondary flowering late in the year, but American wisteria tends to produce blooms throughout the summer. Sorry, your blog cannot share posts by email. In spite of its beauty and fragrance, wisteria is a fast growing vine that can quickly take over plants (including trees) as well as any buildings (like your home) if given the chance. 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