I have an area of lawn that I would like to turn into a veggie patch. Well, "lawn" is probably a bit of a stretch - it is more like random blades of grass poking their way through dense wild violets. The question is how do I get rid of the violets (and grass) before making the veggie beds? Would putting down black plastic and letting them fry get rid of my most hated weed? I'd rather not use round-up as it will be a veggie patch in the future. And in my experience if I just mulch over the violets they manage to poke their way through in the end.