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Carpetgrass is a low-maintenance grass requiring little fertilization that thrives in subprime growing conditions. However, regular mowing is necessary to avoid the growth of unsightly seed stalks, and you may have to water it frequently to prevent drying out the soil. That includes watering the grass over dry winters to help keep it healthy, and it may start dying out in particularly cold climates where it grows poorly. Carpetgrass can also be vulnerable to some types of turf fungus, so it’s important not to overthatch. 

You should apply sulfur to your lawn in the spring or fall when it is below 80 degrees Fahrenheit. Aim for a day with little to no wind so you can apply it with precision. You can apply sulfur to an established lawn or mix it into the top 6 inches of soil on an unplanted area.

You can fertilize right after mowing as long as you've collected the clippings. If you leave grass clipping, they can form a mat that prevents the fertilizer from reaching the soil. Plus, grass clippings are rich in nitrogen, so if you leave them and then apply fertilizer, you can end up with too much nitrogen in the soil.

You should put pre-emergent herbicide and fertilizer on your lawn in the spring. Pre-emergent herbicide keeps weeds from taking root. Fertilizer helps your grass to grow lush and dense and blocks future weeds from growing. You can also add amendments, such as sulfur and lime, to enhance your soil quality.