St. Augustine grass, Stenotaphrum secundatum, is a warm-season lawn grass that is found along the Gulf Coast in the United States. It spreads from above ground stolons that spread out from the main plant, root into the ground and form a new plant. In certain circumstances, St. Augustine grass might be growing where it is not desired, or it might have spread beyond its boundary. St. Augustine grass is killed easily with a non-selective herbicide such as Roundup. Proper application is essential to achieve adequate kill and to prevent injury to surrounding plants.
Read the label on your non-selective herbicide and pour the appropriate amount into your pump-up sprayer.
Fill your pump-up sprayer the rest of the way with water. Fill it up over a paved surface in case the chemical accidentally splashes out of the sprayer.
Pump up the sprayer and spray your St. Augustine grass until the foliage is completely soaked.
Reapply the non-selective herbicide in two weeks to areas that didn't achieve total kill.
Remove the dead St. Augustine turf with a shovel or till under with a rototiller. Your area is now ready for planting or other landscaping.