If you’re experiencing establishment problems, reevaluate your watering schedule. Remember, during dry periods, you may need to water sod multiple times a day to keep it moist. Another common problem is foot traffic. Keep everyone off the lawn for three to four weeks after installing your sod to give the grass a chance to anchor.  If you’re installing in winter and the sod is dormant, keep watering it. According to the Purdue University extension, “Lack of irrigation is the number one reason dormant sodding is unsuccessful.”