My wisteria has rooted itself, on a substantial branch, now perhaps a secondary trunk. It’s in the way of a building project. I want to but it free of its roots and push it out of the way to build where it is rooted.
Thank you for contacting Toronto Master Gardeners about moving your wisteria’s secondary rooted branch out of the way of your building project. Your question does not identify which species of wisteria which can be either the native American Wisteria (Wisteria frutescens) or the more aggressive non-native species, Chinese wisteria (Wisteria sinensis) or Japanese wisteria (Wisteria floribunda). The proximity of the rooted branch to the mother plant complicates the task as there will be damage to its roots. Wisterias are deeply rooted vines which grow anywhere from 1 m to over 3 m deep. The more aggressive varieties may continue to produce off-shoots after disturbance. These will need to be removed, as they appear overtime, to prevent spread.
Due to its rooting habit, pushing the rooted branch out of the way is not really a viable option. You might consider removing the rooted branch, starting by pruning out its branches from the top down to the ground and clearing the attached roots. Keep in mind the ongoing task of removing the off-shoots that appear.
It is strongly suggested that you consult with professionals at Landscape Ontario for further information on your particular plant. You may find this article helpful – Wisteria pruning
Wishing you much success with your project