My lawn is infested with tall fescue. How can I eradicate it short of using a nonselective herbicide. The problem area is prominently in my front yard, so I'm leery of killing everything and starting over. Is there a selective? Anyone use "Certainty"? Anyway, any help appreciated. Some other info: I live in central NJ (Zone 5?) and my grass is otherwise a kb/rg/f mix. I've been using Jonathan Green's Sun and Shade mix for a few years now.