To allow your lawn to develop to its full potential, it needs a healthy supply of nutrients. Only begin to fertilize once grass starts turning green.
Following a regular fertilizing schedule will produce a thick, healthy lawn so weeds can't readily take hold. Read labels to get the right blend for the season. Feed again in late spring, summer and early and late fall.
Over-seed bare patches on your lawn with a high-quality seed that meets the needs of your specific growing environment (sunny, shady or drought conditions). Prepare the grade by loosening existing soil in bare or thin areas, removing thatch and raking to smooth the soil surface. Add about a 1/2-inch of lawn soil to bare patches. Spread seed with a broadcast spreader, designed for small areas.
The secret to healthy and beautiful grass is simpler than you think. All it takes is 30 minutes of watering a couple of times per week. Water only when your lawn really needs it and long enough to soak in deeply. Deep watering encourages long, strong roots. Run sprinklers long enough to put down a 1/2-inch of water twice a week. Water early on calm, non-windy mornings to minimize evaporation.
For taller grass, adjust your mower to a higher setting, never shorter than 2 1/2 inches. Leave grass clippings on your lawn. As they decompose, they add nitrogen to the soil and stimulate beneficial earthworm activity.
Aerating your lawn with a coring machine allows a better flow of water, air and vital nutrients to grass roots. Do this in spring once the soil is dry, not mucky from melting snow.