Organic products can be applied to lawns in several ways. Commercially processed organic matter is obviously one option. Homeowners can also apply organic matter throughout the growing season by grass-cycling when they mow. Leaving lawn clippings adds a considerable amount of organic matter to the lawn, and over the years, provides a good base for healthy soil microbes to thrive.
Compost is another soil amendment that can be applied annually to the lawn. This is like a super-dose of organic matter that will quickly bring a depleted, microbe deficient, soil new life.