Lawn fertilizer promotes rapid growth, healthy root systems, lush green color, and boosts the overall health of the grass. Lawn fertilizer also helps with drought protection, cold tolerance, and disease resistance. Some fertilizers also prevent weeds and unwanted growth, kill moss and fungus, and control insects.
Lawn fertilizers are either granular, liquid, organic, or synthetic and contain three main nutrients: nitrogen, phosphorous, and potassium (NPK).