Regenerate Your Soil and Turf Keep your native meadow and native turf grass healthy and vigorous by improving the soil. Traditional lawn fertilizers go heavy on the nitrogen (and herbicides) that leave the soil compacted and depleted of humus, earthworms and beneficial soil microbes. Instead, build the soil under the grass with this superior blend of compost, alfalfa meal and humate, and watch your native grass thrive with less care and irrigation. A 1 cubic-foot bag covers 1,000 square feet.