Wisteria is a beautiful climber, a deciduous vine has beautiful purple and violet flowers and there is also white flowering kind. They can also be trained to be a tree as well they are propagated from cuttings since seeds take a long time to bloom. If the soil is too alkaline then you can add iron. Pruning can help flowering. Withhold nitrogen fertilizers during the growing season or in general. They usually grow up to 16′ feet but some grow even taller, much much taller.
Varieties include Japanese Wisteria, Chinese Wisteria, and Silky Wisteria which has more bluish flowers. Wisteria comes in a variety of purples and violets, and there is a white version as well. But most popular is a purple one that grows very tall called Wisteria sinensis with mauve flowers others are Wisteria floribunda macrobiotics, it has very long racemes. Wisteria Sinensis has two varieties one Wisteria sinensis alba which has white flowers, and Wisteria sinensis plena with double mauve flowers. There are other varieties with white flowers such as Wisteria venusta.
Many times you see Wisteria growing over trees creating a beautiful display of flowers in May or June. Some varieties rebloom in the summer. They do best in a sunny location and fairly rich soil and they can grow to 30′ feet tall. They are fragrant and create a visual spectacle.
Wisteria is native to the Eastern United States as well as Western Asia, Japan, China, and Korea. In fact, wisteria is one of the flowers depicted in many Asian paintings and artwork, even embroideries, vases, and sculptures. Did you know there is a Wisteria plant in California Sierra Madre that is known as the largest in the world it covers 1 acre!
Some of the species of Wisteria have popular names as well such as the Wisteria floribunda is known as Japanese Wisteria, the Wisteria frutescens is called the American Wisteria, the Wisteria macrostachya is known as Kentucky Wisteria, the Wisteria sinensis is the Chinese Wisteria and Wisteria venusta is the Silky Wisteria. Wisteria Sinensis is very hardy and fast-growing, it does not require rich soil but usually, they do well in richer soil.
You can propagate Wisterias through cuttings and seeds, but if you choose seeds it could take decades for it to grow and bloom. Some gardeners do grafts and get the Wisteria to bloom. Also be careful with fertilizers, over-fertilizing the Wisteria can also stop it from blooming. It loves phosphate and potassium but not nitrogen.
Wisteria does not bloom until it reaches maturity and in some species that could be almost twenty years. Sometimes you can do root pruning expose it to drought to artificially age the plant so it starts blooming. The blossoms are usually near last year’s growth so in spring you might want to prune back some of the new growth so you can better view the blossoms when it is time. If you have a fence a pergola or any kind of a structure in your garden or deck then this is a great choice.