Why isn't my wisteria plant blooming?

Why doesn't the wisteria bloom?

I've had a wisteria in my garden for ten years. To this day it has only blossomed once. I know that the flowers have to come first and then the leaves. What am I doing wrong?


The blue Chinese wisteria (Wisteria sinensis) is also called wisteria because of its striking blue-violet flowers, it is poisonous and belongs to the family of the butterflies. The plants need a moist, well-drained, humus and nutrient-rich soil in a full sun. The reasons for a failure to bloom can have various causes with Wisteria:

Plant pruning:
The vigorous climbing plants (up to 10 m in length) have to be severely cut back to only a few eyes after planting. This is the only way for the plants to bloom after two to three years. Without pruning, they will only produce flowers after several years. After planting, moist, humus-rich earth is gently piled up, then the eyes drive out more easily.

Cut back:
Incorrect pruning could unconsciously remove the flower-forming shoots. Wisteria blooms on perennial wood. Therefore, when pruning, do not carry out any cosmetic measures on young or annual shoots, but rather thin out the main shoots up to the perennial wood if necessary. For rejuvenation, Wisteria can also tolerate a strong cut back to 40 to 50 cm.

Plant type and variety:
Plants propagated from seeds rarely bloom. When buying, look out for grafted plants. The type of plant also plays a role. In addition to the species described here, there are other species and varieties. Wisteria floribunda (Japanese wisteria) grows weaker, reaches a plant length of only 5 m and usually only flowers after ten years; the Issai Perfect variety after just three years. It is noticeable that in this species the shoots always twist to the right, while in Wisteria sinensis they twist to the left.

If an old wisteria does not bloom, try a courageous pruning. If you take care of the new shoots in the coming years, they should flower after two to three years. Of course, care measures such as pruning can do little to counteract the plant's own conditions, seedling propagation, species or variety with late flowering.