The battle here is thistle. It grows a deep rooted rhizome that spreads. I don't feel like digging down to remove it all so we just keep pulling. The thorns get me every now and then though, especially if the plant grows more than just a few inches before I pull it.I feel your pain. My battle with Asian Jasmine is horrendous- but I am making headway. After the next rain( any day now) I can finish up removing the stuff from the side of the house and move to the front