invasive plant roots.

Next door has a rampant passiflora along my fence, thats ok but the roots are invading my garden under the old stone wall that has no foundations. I saw several new plants popping up all over and have just dug some roots out, they are sturdy, white and one was over 3m long travelling in a horizontal direction, they are going to be a terrible nuisance in my new potager garden

I have though long and hard and decided to get some rootex root barrier, which of course means digging a parallel trench. To do so I have had to remove all my plants along that wall and some already had entangled white passiflora roots, ready to spring into action.

A plea to people, please research what you decide to plant along a neighbouring wall or fence. I am stuck with her problem plant and it has cost me 12 good plants and almost £90 for the barrier plus endless hours of work to dig deep enough in this very rocky ground