native grasses (cool season) such as bluegrass and tall fescue, are greenest in the spring and fall and go dormant in the high heat of the summer. new cultivars of bluegrass, such as reveille, and tall fescue, can reduce typical bluegrass water requirements by at least 30 percent. fine fescues can provide substantial water savings and are best used in areas that receive low traffic or are in shady locations.