How can I get rid of pampas grass?
Hi, Well if it were me, I'd chop it down to the ground and immediately spray it with Round-up herbicide. If the Round-up didn't work, I'd up the ante and use a herbicide designed to take out woody plants. If you don't want to deal with herbicides and you have more time, then I'd cover the patch (after cutting it down to ground level) with black plastic and leave it in place all summer. This should knock it out as well, but it will take some time.