If you have a healthy lawn you will have a healthy population of earthworms. Earthworms provide a natural fertilizer for your soil and their diet consists of plant litter, soil and organic matter. Earthworms also improve the aeration of your soil and help with thatch decomposition.

Before planting your new lawn, determine your soil type. There are three basic types of soil, sandy, loamy and clay. These three basic types of soil can also be found in combination.

Determining the health of your soil is essential in establishing a healthy lawn. Your local Agricultural Extension office will perform a soil analysis and give you advice on what nutrient to add to bring your soil up to it's healthiest.