Roughly 7,500 grass species are grown around the world, but only 14 species are adapted as turfgrasses that have been used extensively. Kentucky is situated in the transitional climatic zone of the United States, the middle point between the cool north and the warm south, with warm summers and cool winters. Because of its unusual climate, no single grass is suitable for all situations and locations.
Munshaw, Gregg, "Turfgrasses of Kentucky" (2015). Agriculture and Natural Resources Publications. Paper 93.