To prevent drying of planting material, keep the top 1.5 inches of the soil moist. This may require light watering two or three times a day for 7 to 21 days. Bluegrass takes 7 to 14 days longer to germinate than other cool-season grasses. As the seedlings grow and root, water less often but for longer periods. For mixtures containing bluegrass, do not make the mistake of decreasing water as soon as the seedlings appear. Continue watering until the bluegrass seedlings emerge. After the third mowing, water to a depth of 6 to 8 inches about once a week or when needed.
Begin mowing as soon as the grass is 50 percent higher than the desired height. For example, mow tall fescue back to 3 inches when it reaches 4.5 inches. The frequency of mowing is governed by the amount of growth, which depends on temperature, fertility, moisture conditions, the season, and the natural growth rate of the grass.
The homeowner should cut often enough that less than 50 percent of the total leaf surface is removed. Use a mower with a sharp blade. To reduce the danger of spreading disease and injuring the turf, mow when the soil and plants are dry. If clippings are heavy enough to hold the grass down or shade it, catch them or rake and remove them. Otherwise, do not bag the clippings. Allow them to fall into the turf where they will decay and release nutrients. This may reduce the need for fertilizer by 20 to 30 percent.
Fungicides and insecticides are rarely needed on new lawns, and different planting methods require different pest control methods. If pesticides are used, always read and follow label directions.