
I don't think I need to explain the importance of a chemical-free lawn, this picture spells it out.
Instead of thinking in terms of what you need to
get rid of in your grass, start thinking about what you need to nurture.
Begin practicing activities that will lead to a healthy and great looking lawn:1. Feed your soil; it's the key to your healthy organic lawn. It needs to be alive with beneficial microorganisms and bugs. Apply a thin layer of compost in the spring and fall over the lawn, and water gently to wash the nutrients and microbes into the soil.
2. Water your lawn deeply (about one inch) on a weekly basis to establish healthy root systems. To measure the amount of water you are applying, place a tuna can under the sprinkler and time how long it takes for an inch to accumulate.
3. Mow lawn to a height of three inches. This is the ideal growth height for the types of grasses most people grow.
4. Leave your grass clippings on the lawn. They are full of nutrients to feed the lawn.
5. To fertilize, apply compost and grass clippings throughout the growing season. A slow-release organic fertilizer can be added in the early fall. It can also be used in the early spring.
6. Use an aerator every four years before fertilizing. Best results can be achieved by renting the equipment designed for that purpose. It pulls plugs of dirt and grass out of the lawn to allow air and water in.
7. Top dress with finished compost over the lawn after aerating and weeding, and before seeding. This can be done in the spring or fall.
8. Overseed, sprinkling grass seed throughout the lawn in the spring and fall. This helps fill in bare spots and choke out weeds.
(from HealthyLawns.org)