The American Lawn
Green but not very health
The great expanses of "greener than green" lawns in the United States is one of the main contributors to water pollution. Pesticide and herbicide used on lawns cause polluted stormwater runoff that contributes to the contamination of our waterways. Turf reduction and sustainable lawn care are great ways to protect water, create habitat and have a healthy lawn without chemicals.
Natural lawn care - A healthy lawn needs at least 5"-6" of nutrient 
rich top soil to grow in. If you don't feel you have this you can spread compost across the entire lawn to the depth of 1"-2". The compost will work into the existing soil and improve the quality. You can also add bone meal, cottonseed meal or dried blood, which release vital nutrients into the soil without destroying natural microorganisms and earthworms vital to its well-being. Or just leave the grass clippings on the lawn when you mow. It is possible to test your soil to determine the nutrient level through your local Extension service.
When cutting the lawn make sure the mower blades are sharp. A dull blade cuts unevenly and may damage the grass. Cut the grass so it stands to the height of 2½" to 3" which will help to develop a deep root system and in turn a thicker lawn. Grass that is cut too short becomes more vulnerable to stress from heat and drought allowing weeds to appear.
When watering your lawn, water deeply (for a long time) and infrequently. About one inch of water, applied in a single watering session once a week should be enough to replenish the grass but not be wasteful. In some cases it might be necessary to water when the lawn appears to need it but once a week is recommended. Watering in the morning is better to reduce evaporation by the sun and wind.
