Tips #7: If you have an established lawn, it’s recommended to water until the top 6-8 inches of soil is wet. But don’t over water your lawn. Most lawns need 1 inch of water per week (which includes rainfall), to soak the soil 6-8 inches deep. The water can be applied during a single watering or divided into two 1⁄2-inch watering’s during the week.
Check the grass every 15 minutes during your first watering. A screwdriver works well for testing how deep the water has moved. Make a note of the time it took to saturate and that’s how long you’ll need to water your lawn in the future. Avoid puddling. If puddles occur, try watering in shorter cycles.
During the first year of your lawn’s growth, whether it’s newly seeded, sodded, or plugged don’t just rely on Mother Nature for rainfall. Additional watering will likely be needed.
If your lawn is newly seeded, keep the top inch of soil consistently moist. Mist the seeded area once or twice each day. Once the seeds begin to germinate, continue until the new grass reaches about three inches. Begin to cut back watering to twice per week and soak the soil deeper, about 6-8 inches, encouraging the roots to grow as deep as possible.