Posted: 06/06/2014 at 11:18
vigilance is the key as FG says. Think of it this way, no plant, not even Japanese Knotweed can survive without light, so as long as you keep at it, whatever method you're choosing to knock it back, then it will work. Hoe it, regularly, once every two weeks at least is the simplest method. I have a bit of it in my garden but it isn't a problem because I keep on top of, plant densely around it and pull it out every time I see it. If you leave it to recover from whatever method you've chosen though, all the effort you've been in so far has been for naught. That's what you've got to remember. But it is a native plant and part of our ecology, it's not Japanese Knotweed or Spanish Bluebells, or Mink... so, ultimately it's only a problem if you see it as such.