What’s more, wisteria is toxic to humans, and toxic to pets.
Even when cut back severely, an established Chinese wisteria produces vigorous new growth. The vine is tough—it is cold-hardy, can even tolerate some shade, and withstand temporarily dry soil so it can grow in many locations.
What Does Chinese Wisteria Look Like?
Chinese wisteria is a deciduous woody vine with smooth gray-brown stems that are covered with fine white hairs. The vine twists counterclockwise and flowers in April or May before the leaves, which are alternate, appear on the vine. The flower racemes are 6 to 12 inches long and lavender to purple in color. The flowers are especially showy because they bloom at the same time on the racemes. After the bloom, the vine develops large brown velvety seedpods that look like beans. The 4- to 6-inch seedpods often remain on the vine throughout the fall and into the winter.
How to Get Rid of Chinese Wisteria
Whichever method you apply to remove Chinese wisteria, it will likely take repeated treatments and persistence to fully eradicate it, as it is such a vigorous grower. The mechanical method of removing wisteria is an option for a small to moderately sized vine, or when you do not want to use a chemical herbicide. It is labor-intensive and requires you to keep an eye on the plant all season long. Cut the vine at ground level early in the season and keep cutting any new shoots through the entire growing season until the fall. This will prevent the vine from developing flowers and seeds and eventually exhaust the plant although it may take another season. To get rid of a large vine, start with a cut stem treatment. In the spring or summer, when the vine is actively growing, cut it close to the ground level and immediately brush the cut surface with a systemic herbicide concentrate such as glyphosate. New sprouts are likely to grow in a few weeks. Use a foliar application of glyphosate or another systemic broadleaf herbicide, taking care not to spray it on any surrounding plants. Repeat as necessary when new sprouts appear.
How to Tell the Difference Between Chinese Wisteria and American Wisteria
A few features set Chinese wisteria apart from American wisteria (W. frutescens), its non-invasive native counterpart. American wisteria has a less aggressive growth habit, it is smaller and matures sooner whereas Chinese wisteria can take a few years to start flowering. The Asian wisteria species, both Chinese wisteria and Japanese wisteria, have long pendulous blossoms with loose dripping petals. American wisteria blooms are shorter, rounder, and more compact. American wisteria is less aromatic than Chinese wisteria.
