The first 90 days are critical for your new lawn, which is seeded with a combination of bluegrass, ryegrass and fine fescue. Water your new lawn in the morning for the first 60 days, with the sprinkler covering each area for 15 minutes. Fertilize four weeks after installation and repeat frequently in the first year.
Allow the grass to grow to 4" before the first mowing. Don't mow shorter than 3" to avoid stressing young plants. Avoid using weed killer the first year and don't rake the straw from the lawn. It will decompose and add organic material to the soil.