How tough are wisteria roots?
We purchased a home with a 3-4 year old wisteria arbor around the patio. The arbor is lovely and I don't want to do anything to damage the wisteria! However, there is grass growing right up to the trunks of the wisteria, and I would like to remove the grass and add in a paver edge against the grass filled in with river rock so that I don't have to try and mow or trim around the wisteria as I don't want to damage the trunks. I did an exploratory excavation the other day and found a wisteria root about 1 inch under the sod -- not deep enough to lay the paver on top of. Do most wisteria roots tend to run deeper than this? Can I safely cut this one root or does it sound like going ahead with this project could damage the wisteria?
thanks for any advice!