Rhizomatous Tall Fescue (RTF) is a unique tall fescue that utilizes patented technology to fill gaps and bare spots fast and requires 30% less water than other varieties. RTF has rhizomes that helps with the filling in of these bare spots in your lawn with new shoots of grass. This results in less overseeding, fewer weed problems and no wide-leafed ugly clumps of grass similar to other tall fescues.