It is best to seed a lawn when it has been dormant for several weeks, or at least during the cooler months of spring and fall. Late winter and early spring are generally not ideal times to plant a new lawn because these seasons tend to be too wet. In addition, many seeds will need a period of time in order to germinate from sowing into moist soil. Therefore, it is best that you wait until there has been no significant rainfall for at least 30 days prior to seeding your lawn. Afterward, do not water the area again within 24 hours after seeding! Watering shortly after seeding may cause the newly seeded grass or turf areas become soft and start dying or rotting away before they have had adequate time to establish roots. This would result in poor quality grass with patchy coloration throughout your yard!