Although Wisteria is not a tree at all, it is a woody climbing vine, on our website we classify it under Deciduous trees. That is because it is trained to be just that.
A couple of times per season we remove the longest sprouts. These can quickly become 50 or even 100cm (1.6 to 3 feet) long. Clipping them is done to retain a “good look” throughout the year as even after 10 years the steps, danzukuri, still need to be developed further.
Throughout the season we take away the runners with special attention to those growing from the trunk. These grow on the whole trunk but most of them close to the ground and just under the surface.
On this photo one of the latter pops-up in a buxus hakozukuri-style shrub that grows about 1,5 meter (5 feet) distant. This is a tricky one to remove. I can not use chemicals like those used on weeds, its root needs to be taken out from the source. That can (to my knowledge) only be done by digging it out. Although the damage to the groundcover can be limited by folding it open and closing it again, like a carpet, it is not something I like to do. For now I cut away the sprout and leave the runner-root in the soil. Perhaps I will first try to locate its source on the trunk. To be continued…
This is a second bloom that can continue the whole summer. The first and full bloom took place in April-May, see Wisteria sinensis in bloom.
For detailed instructions on how and when to prune, see Wisteria sinensis pruning and run the slide-show. There you also find the text.