Just like a house needs a solid foundation, grass needs good soil with the proper nutrients for a beautiful lawn. Know Your NumbersIt's easy to get confused by the fertilizer numbers. Here's a quick primer. In order, the numbers are:Nitrogen - Phosphorus - PotassiumNitrogen makes your lawn green, promoting foilage growth. Phosphorus helps establish healthy root systems. Potassium makes your grass strong and disease resistant. **Coverage numbers are only estimates. Fertilizer use should be based on your soil's nutrient levels. **