Water your new lawn frequently and lightly at first, since its roots will be shallow and quite vulnerable to extreme moisture. Gradually reduce the frequency and increase the dosages. Once well rooted, letting the soil dry to a depth of several inches will help the grass develop deep roots. Remember: no lawn can survive a hot Texas summer without extra watering. Fact is you'll need to water your lawn during other seasons as well. Grass roots remain alive during the winter, and a good soaking every few weeks may be the key to pulling the grass through in prime condition.