Some combination products contain a mulch-like ingredient. This holds the seed in place while preserving the soil temperature and moisture. The mulch breaks down over time.
Slow-release nutrients including nitrogen, phosphorus and potassium will feed the new grass, without the need to add more fertilizer. The three nutrients combine to make the grass green, make the roots strong and improve the health of the blades.
One container of grass seed and fertilizer can cover about 100 square feet of lawn. Use the product for the entire yard or to patch dead areas. Make sure the grass type grows well in your region and conditions.