Wisteria floribunda, common name Japanese wisteria, is a species of flowering plant in the family Fabaceae, native to Japan. Growing to 9 m, it is a woody, deciduous twining climber. It was first brought from Japan to the United States in the 1830s. Since then, it has become one of the most highly romanticized flowering garden plants. It is also a common subject for bonsai, along with Wisteria sinensis (Chinese wisteria). The flowering habit of Japanese wisteria is perhaps the most spectacular of the Wisteria genus. It sports the longest flower racemes of any wisteria; Some of those cultivars can reach 2 m in length. These racemes burst into great trails of clustered white, pink, violet, or blue flowers in early- to mid-spring. The flowers carry a distinctive fragrance similar to that of grapes. The early flowering time of Japanese wisteria can cause problems in temperate climates, where early frosts can destroy the coming years’ flowers. It will also flower only after passing from juvenile to adult stage, a transition that may take many years just like its cousin Chinese wisteria. Japanese wisteria can grow over 30 metres long over many supports via powerful clockwise-twining stems. The foliage consists of shiny, dark-green, pinnately compound leaves 1030 centimetres in length. The leaves bear 9-13 oblong leaflets that are each 26 centimetres long. It also bears numerous poisonous, brown, velvety, bean-like seed pods 510 centimetres long that mature in summer and persist until winter. Japanese wisteria prefers moist soils and full sun in USDA plant hardiness zones 5-9. The plant often lives over 50 years. This is the white flowering variant of Wisteria floribunda.
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