A green and healthy lawn is easy to achieve with a bit of work. A little effort now will save you a lot of effort later, because healthy lawns are less vulnerable to pests, weeds, drought, and other problems. Follow these seven tips: Mow high – Cut your grass to a height of 6 to 8 centimetres (2.5 to 3 inches). This height (instead of cutting shorter) will promote growth, prevent weeds, and discourage insect pests. Water deeply – Water your lawn deeply (but not too often) to promote the growth of deep roots. Apply about 2.5 centimetres (1 inch) of water, only when needed (usually no more than once a week). Place a small pet food or tuna can on the lawn to help you measure how much water has been applied. Stop watering when the can is full. Too much water starves the soil of oxygen and invites disease. Feed – Feed your lawn with compost. Let grass clippings stay on your lawn to provide nutrients. Aerate– Aerate compacted soil, ideally in the fall. This helps water, air, and nutrients reach plant roots more easily. Over seed – Sow new seed over thinned areas, or choose other ground covers for tough spots. Replace – Replace grass with paving stones or mulch in heavy traffic areas. Check – Check your lawn often to detect pests and other problems early.   Source: http://healthycanadians.gc.ca/healthy-living-vie-saine/environment-environnement/home-maison/lawn_healthy-saine_pelouse-eng.php