Anyone have any experience with perennial Rye grass? <shakinghead> My dad planted it in the pasture as a ground cover, and BOY, did it!!! Once it's established it has HUGE root systems, and chokes out most everything else. It also reseeds freely, and invades things like my asparagus patch. grrrrrr Since i am old and crippled up, digging it out is wayyyyyyyy much work for this old bod. Will the cardboard, mulch thing work for something so tenacious?