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Pull bahiagrass by hand before tilling the garden. Lay down wet newspaper and 3 inches (7.6 cm) of mulch over the soil. Apply glyphosate before planting for the season. Use sethoxydim after planting.
If you have a small garden plot or landscape bed, you can pull out the bahiagrass easily. Wait until after it rains or water the grass bed until the top 10 inches (25 cm) of soil are moist to make the bahiagrass roots easier to remove. Simply place your hand near the base of the bahiagrass and tug it out of the ground by hand. Do this before tilling the garden so as not to spread the seeds and rhizomes. Newspaper and mulch block the sunlight which would make seeds or rhizomes grow, making it an effective eradication technique. After pulling the visible bahiagrass, lay down 6-8 sheets of wet newspaper over your garden or landscape bed. Then, spread 3 inches (7.6 cm) of mulch, like grass clippings, pine needles, or compost, on top of the newspaper. The newspaper will decompose, so you don’t need to worry about removing them. At least 3 days before you plant flowers or vegetables, apply herbicide to the garden or bed to prevent bahiagrass from growing. Use a post-emergent herbicide like glyphosate. Refer to the herbicide package for application instructions. Glyphosate can be found at lawn and garden centers. If you begin to see bahiagrass growing back after you’ve planted your flowers or vegetables, you can kill it with sethoxydim. Sethoxydim is a selective herbicide that will kill grass weeds without harming your plants and veggies. Apply it as directed on the package.  Look for sethoxydim at your local lawn and garden shop. Don’t use sethoxydim if your garden or bed contains sweet corn.