PhilaGardener, that is so very kind of you! Please check your PM.
I made a bed specifically for these things after reading about their invasiveness. It's bordered on all sides by old 6x6" timbers. But I suppose they could maybe slip under the timbers and pop up on the other side. Wily devils! But if they do, I live out in the country so.... that's why God invented lawnmowers.
