Extended periods of hot weather during the summer can take a toll on your lawn, especially areas that are fully exposed during the day. Without the benefit of an adequate supply of water, your lawn can endure severe stress, making it more susceptible to insects, disease and unsightly browning. A regular watering regimen will solve this problem.
Watering your lawn first thing in the morning (even before sunrise) is generally considered the best time to water. By doing so, you'll give the water an opportunity to soak in before it has a chance to evaporate, and any moisture that doesn't take to the soil will be gobbled up by the hot summer sun. If you water in the evening, you run the risk of any excess water sitting on your lawn and fostering fungal damage.
Your lawn's roots will only travel as far as the water does, so light watering will result in roots that stay near the surface. Deep watering will therefore encourage deep root growth, so it's extremely important to provide the right amount of water to your lawn. It also means less frequent watering because it will take longer for the soil to dry out.
We generally recommend a 1-2 inch application twice a week by watering for 5 minutes, then allowing the water to soak in for 15 minutes, and repeating until the desired amount has been applied. This will not only conserve water, but also reduce runoff.
If set-up and placed correctly, a sprinkler system will consistently cover your entire lawn and can be programmed to water as frequently as you need it. Just remember that water tends to pool around the base of sprinklers, so rotating their locations even on small lawns is a good idea. If your lawn is too large to be covered by your present amount of sprinklers, either purchase more to ensure total coverage or move them to dry areas after one area has received an appropriate amount of saturation.
Many people feel that if a little water is good, then more of it must be better. This is not the case when it comes to watering your lawn. In fact, more problems occur from over-watering than under-watering. By applying too much water to your lawn, you can wash away essential nutrients from your lawn and leave pools of unabsorbed water that will encourage fungal spores and disease.