Will Watering the Lawn During the Day Burn My Grass?

Key Takeaways

Insights on lawn watering:
  • Daytime Watering Myth: Watering your lawn during the day does not cause grass to burn; this misconception has been debunked.
  • Optimal Watering Times: Early morning or late afternoon watering is most efficient for hydration and minimizing disease risk.
  • Watering Strategies: Adequate watering depth and choosing the right grass type for your climate can significantly enhance lawn health.
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Cultivating a healthy lawn can take a lot of effort. Everyone knows that grass needs adequate soil, the right amount of water, and sunlight. But the right combination of these factors can still be hard to achieve. 

Anyone working toward a beautiful lawn has probably heard the old advice that you shouldn’t water it during the day during hot weather. The reason is that the sunlight will heat the water droplets and ‘burn’ your lawn, leading to dead patches. Whether or not this happens has been disputed for a long time. 

But the short answer is that no, watering the lawn during the day - even on hot days - will not burn it. This theory was debunked by Richard Gray in 2010. Instead, watering your lawn will help your grass grow healthy, even if it’s done during the hottest time of day. 

When is the best time to water the lawn?

Even though watering your lawn while it’s hot will not kill it, there are benefits to selecting certain times of the day to water. 

  • Morning: Before 10 AM is commonly considered the best time to water your lawn to keep it hydrated and cool enough to withstand heat. Wind and sunlight are minimal during the morning, ensuring that less water is evaporated or blown away. 

  • Mid-Day: While watering in the middle of the day won’t kill your lawn, it isn’t very efficient. Much of the water may evaporate, meaning you will need more water to water the root systems adequately. 

  • Late Afternoon: Late afternoon is considered the second-best time to water, as it is generally cooler with less wind. It also provides time to dry before nightfall, preventing your lawn from becoming diseased. You may also want to give your lawn a second watering at this time if you notice it is under drought stress. 

  • Night: Watering at night can increase the risk of your lawn becoming diseased since fungi and other tiny organisms are attracted to water at night.

In addition to watering at certain times during the day, other strategies can enhance your lawn care regimen and give you a stunning lawn. 

  • Don’t overwater: Grassroots go down about six inches from the surface. Therefore, give your grass at least one inch of water at the surface level to ensure they get enough water. In clay soils, you will need to avoid and watch for runoff and consider stacking your watering times. For sandy and loamy solid, you will need to have longer watering times.

  • Choose the right grass: You also want to select the right grass seeds for your climate. For example, some areas may do better with cool-season grasses that turn green during the summer and dormant in the winter. 

  • Invest in a sprinkler system: Automatic sprinkler systems make it easy to water the right amount at an optimal time of day. You can just set the system to run for a predetermined length at a specified time. This option can prevent over or under-watering.

Proper lawn care can take a lot of effort. But you don’t have to worry about killing your lawn if you water during the hottest part of the day. However, you may want to consider alternative times that are better for water conservation and promoting healthy soil and grass.