The best practice is using rainwater to water your lawn, if possible. Watering a lawn can use up a lot of water, especially if you are using processed tap water. Instead of using the hose, try to capture rainwater in a rainwater collection barrel and use this to water your lawn in the summer. Rainwater is soft, so it is ideal for watering your lawn and plants.
Get a large barrel and place it outside to collect water when it rains.
Skip watering after it rains because enough water will fall directly onto your lawn. Wait to use the rainwater until you hit a dry period.
Wait until your lawn starts to turn yellow or brown to water. If you have to water your lawn, water just enough to keep it from turning brown and avoid running sprinklers too regularly. For example, you could turn the sprinklers on for a full night once a week, rather than misting your lawn every night.
Your lawn will usually recover from turning brown. Although grass can turn yellow or brown quickly during dry periods, this does not mean the grass is dead or dying. It is only becoming dormant; the roots are still alive.
Water your lawn during the cooler parts of the day. Watering your lawn when the sun is shining or when it is hot will not do your lawn much good because the water will evaporate quickly. Water your lawn early in the morning or after the sun goes down. This will allow the grass to soak up the water before the sun dries it up.
You should apply a fertilizer to your lawn and plants once every 6 to 8 weeks if desired. Choose a slow-release plant fertilizer and follow the manufacturer's instructions for how to apply it. Wait until the soil temperature reaches no more than 65F to apply the first layer of fertilizer, and then apply the fertilizer once every 6 to 8 weeks through the summer and into the fall. Look for a granular fertilizer that you can just sprinkle onto the lawn and plants.