Watering must be started immediately after the sod is installed. It is essential that enough water be put down the first time to thoroughly soak the sod and the soil underneath. You can check the moisture content by lifting up a flap of the sod and sticking your finger into the soil. It should be moist several inches deep. By giving the sod a heavy first watering you will rid the sodded area of pockets, which dry out the sod. Pay special attention to the corners and edges
of newly sodded areas.
If a newly sodded area accidentally does dry out it will probably turn brown. It is not dead and will green up in about two weeks with proper water application.
After the first watering, water enough to keep the soil under the sod moist, not muddy. In cool weather this may mean watering only every 3 or 4 days, in very hot weather you may have to water daily. Do not allow the sod or soil underneath to dry out completely between watering. In about 2 weeks the sod should begin to root in and the watering can be cut back to once or twice per week, depending on the weather conditions. Water anytime the sod has a dry pale blue gray color or if the grass does not spring back after walking on it. It is important to know that frequent shallow watering is not good for your lawn. Shallow watering causes the root system to grow near the surface. Water less often but water deeply. Over time the roost will follow the water down into the soil and you will have a lush healthy turf.
Newly seeded lawns, it is important to water daily for the first two weeks. The best time to water is in the morning and late afternoon. Do not water at night this will promote fungal growth. Once the grass starts growing, water 2-3 times per week or more in hot, dry weather. It is important to keep the new seed moist but not saturated. Straw holds moisture, do not remove the straw until after the first mowing.
About 2-3 weeks after installation your new lawn may need mowing. It is important to let your lawn dry out for a day or two so it firms up a bit before mowing. Make sure that the mowing height is set at 3″ or highter. Letting your lawn
grow a little longer is good for the grass because it encourages a strong root system. Never mow shorter than 2″ and never remove more than 1/3 of the grass leaf at any one mowing. Not bagging your grass is a great idea, it returns the clippings to the lawn so they can decompose and provide added nutrients. It is also important to keep your lawn mower blades sharp. A dull blade will shred the tops of the grass blades, discolor the lawn and invite disease. The mower blade should be sharpened at least once or twice a year.