Bahia grass, also known as Paspalum notatum, is a warm-season perennial grass. It has a coarse texture and an open canopy, and it spreads via stolons and rhizomes. Bahia grass (also commonly written as one word, Bahiagrass) proves to be very aggressive and can be found growing along highways in the southern United States due to its durability. However, when growing in a home lawn, it makes a very undesirable turf. Controlling it in your centipede grass lawn is vital to maintaining a healthy-looking as well as healthy-feeling lawn.
Apply pre-emergence herbicide in the spring before Bahia grass can germinate. A respected brand-name pre-emergence herbicide is Atrazine. Apply pre-emergence herbicide in the spring when air temperatures rise above 65 to 70 degrees F for four days in a row.
Dig up the Bahia grass if you have small amounts of it in your yard. Use a shovel and dig down around the entire plant. Lift it up and fill the depression in with clean soil and grass seed. Ensure you remove the entire root system, or the Bahia grass may regrow.
Apply a post-emergence herbicide with the active ingredient sethoxydim. Hi-Yield Grass Killer and Vantage are two brands that have this chemical. Follow the directions on the packaging and apply no sooner than 3 weeks after your centipede lawn greens up. Withhold mowing 7 days before and 7 days after applying this chemical.
Reapply the post-emergence herbicide 3 weeks after the first application to further suppress the growth of Bahia grass and to prevent any seed-head formation.
Maintain a well-fertilized and well-irrigated lawn to set your lawn at an advantage for keeping Bahia grass at bay. Healthy lawns have lush and thick turf that prevents other plants from taking hold in the soil.