Scotts Turf Builder Grass Seed Bermudagrass is a warm season turfgrass that can generally be used in areas that St Augustine grows in. We generally do not recommend mixing St. Augustine grass and Bermuda grass, however, since these grasses have different care requirements.  The best way to determine what grass seed would grow and establish well in your area would be to speak to someone at your Local Master Gardener center for what will thrive in your weather and environments conditions