Rhizomatous Tall Fescue (RTF™) is a new type of tall fescue, which produces rhizomes. A rhizome is a creeping stem or runner that extends outward from the main plant underground. The rhizome will send a shoot up to the soil surface while extending new roots downward, forming a new plant. RTF behaves like a bluegrass, but like any other fescue it will survive the transition zone. The only seed you'll ever need!