Mother Nature usually provides enough water through rainfall for grass to grow strong. However, there are times when rainfall needs to be supplemented, such as with newly planted lawns or extended periods of heat and drought. If you choose to water, wait until the lawn becomes dull green in colour and footprints remain visible in the grass.
Be sure to water deeply and infrequently. Avoid watering from 11am–3pm, the hottest part of the day. It is best to water between 6–10am. There’s less wind, less hot sun, and your lawn has a full day to dry. Watering at night invites mildew and fungus but if you can’t water in the morning aim for around 4–7pm. If using sprinklers, apply about a ½ inch of water twice per week.