Transition zones are areas where neither cool nor warm season grasses are completely adapted. Summers tend to be too hot for cool season turfgrass to do well, while winters are too cold for good warm season grass survival.
This region ranges from the coastal states of Delaware, Maryland, North Carolina, Virginia, Tennessee, Kentucky, Arkansas, Missouri, far eastern Oklahoma, and Kansas.
Tall fescue and Kentucky bluegrass are cool season turfgrasses used in the northern parts of the transition zone. Warm season turfgrasses used in the southern parts of the transition zone include Bermudagrass, Centipedegrass, Zoysiagrass, and St. Augustinegrass.
Dunn, John, and Kenneth Diesburg. 2004. Turf Management in the Transition Zone.Hoboken, N.J.: Wiley & Sons.