Hydro Seeding Mulch is granule plant fiber mulch and is 100% natural, eco friendly and biodegradable. Holds soil in place more effectively than paper mulch and wood mulch. When mixed with seed and fertilizer, it forms a homogeneous slurry that ensures evenly distributed strand of grass. Comes in granule form and is easier and saves transportation. These sterile mulch holds ten times moisture of its weight and the seed survival rate is highest.