we have canadian thistle really bad. I have been using round up trying to kill the weeds and grass around the garden area so it will be much easier to do the landscaping that I need to. I can say that both chemicals do NOT kill the god damn shrubs along the back fence grrrrr. We also somehow have problems with night shade in the back of the yard and it is trying to climb into the shrubs and through the damn chain link fence. If I thought I could get away with a couple of goats in the yard for a couple of days I would do it.