The Pennington Seed Starter Straw Blanket is an excellent solution for establishing new grass and preventing soil erosion. This 4 ft. x 50 ft. blanket is made from 100% biodegradable wheat straw, which enhances seed germination by protecting the seed, holding it in place, and retaining moisture. Ideal for use on hills, slopes, and other challenging areas, this straw blanket also helps control weeds and can be placed around foundations to prevent mud splatter and masonry stains. Once the grass has grown, the blanket naturally degrades, leaving you with a lush, green lawn.