Plant profile
Botanical name: Wisteria floribunda
German name: Japanese blue rain
Flowering time: May to June
Blossoms: Purple, blue, pink, white
Foliage: Summer green
Growth habit: Climbing plant, climbing shoots
Origin: Japanese island area
Details of the Wisteria floribunda
The Japanese blue rain blooms in the early summer months of May and June. Contrary to what the name might suggest, it comes in different varieties. The colour of the flowers can therefore range from violet-blue to pink or white. Many small, butterfly-like individual flowers hang together in dense clusters and ensure that the Wisteria floribunda is a highlight in any garden. Thanks to its special shape, the flowers hang luxuriantly from the branches. However, it is not only the shape but also the scent that is reminiscent of grapes. It is pleasantly sweet and attracts insects such as bees and butterflies.
After flowering, elongated green beans develop. If the plant enjoys long hours of sunshine, the beans open and throw seeds into the surrounding area. The legumes must not be eaten as they are poisonous. In contrast to the Chinese blue bean (Wisteria sinensis), the Japanese bean is less vigorous.
Japanese blue rain prefers fertile and moist soil that is permeable to water. Particularly in the first year, during the flowering period and on hot summer days, care must be taken to ensure that the plant receives sufficient water. In addition, winter protection with fleece is recommended in the first few years. The buds are still sensitive to frost at this time. After that, the Wisteria floribunda can withstand temperatures as low as ‑17°C. The ornamental plant likes sunny locations that are sheltered from the wind. The sunnier the spot, the more abundant the colourful flower clusters.
Use of the Japanese blue vine in design
An outstanding feature of this climbing plant is its extremely vigorous growth. It can easily reach a height of up to ten metres. In order for the Wisteria floribunda to grow tall, it needs a strong and robust climbing frame. It twines in a clockwise direction. It is important to bear this in mind before attaching the shoots. Everything in its vicinity will be entwined by the plant.
This ornamental plant is therefore particularly suitable for embellishing pergolas, walls or façades. As a climbing talent, it entwines itself around everything and creates captivating highlights in any garden with its cascades of flowers.
It is also possible to integrate the Japanese blue rain into the garden as a standard. It should be noted that it requires regular pruning, especially in the first few years. On terraces or balconies, Wisteria floribunda can grow in large planters and provide an exciting splash of colour. Due to its unique characteristics, the Japanese blue rain can be integrated into any garden, terrace or balcony.
