Watering your lawn in Tennessee correctly becomes especially important in August, when high temperatures and periods without rain can put extra stress on your grass.
By August, summer is in full swing across Middle Tennessee. Hot afternoons, strong sun, and stretches without rain can put significant stress on your lawn.
However, simply running the sprinklers more often is not always the answer. In fact, watering too frequently can cause problems of its own.
When watering your lawn in Tennessee, the goal is to provide enough moisture to reach the roots. At the same time, you want the soil to dry slightly between watering sessions. This encourages stronger roots and a healthier lawn.
Here is what Tennessee homeowners should know about watering their lawns during August.
How Much Water Does a Tennessee Lawn Need in August?
Most Tennessee lawns do not need more than about 1 inch of water per week, including rainfall. Some warm-season grasses, including Bermuda and zoysia, may perform well with around half an inch per week.
However, the exact amount depends on several factors. Soil type, sun exposure, grass variety, slope, and recent rainfall all make a difference.
University of Tennessee turfgrass guidance recommends watering deeply and infrequently. The weekly amount can generally be divided into one to three irrigation sessions.
Therefore, avoid automatically watering every day. Frequent, shallow watering encourages grass roots to stay close to the surface. As a result, your lawn may become less resilient during hot and dry weather.
How Often Should You Water Your Lawn in August?
For many established Tennessee lawns, two or three deep watering sessions per week are more effective than light daily watering.
However, your schedule should always account for rainfall.
If a summer storm delivers significant rain, reduce or skip your next irrigation cycle. There is no benefit to watering soil that already has enough moisture.
You should also avoid relying only on a preset sprinkler schedule. August weather can change quickly in Tennessee. One week may be extremely dry, while the next may bring several thunderstorms.
Instead, adjust your irrigation based on current conditions.
What Is the Best Time to Water Your Lawn?
Early morning is generally the best time to water your lawn.
Morning temperatures are cooler, so less water is lost to evaporation. In addition, the grass has time to dry as the day warms.
Try to avoid watering during the hottest part of the afternoon. Much of that water can evaporate before reaching the root zone.
Watering late in the evening is also less desirable. Grass that stays wet overnight may be more vulnerable to disease.
University of Tennessee guidance recommends irrigating during the morning rather than around sunset.
Water Deeply Instead of Watering Every Day
One of the most important summer watering habits is encouraging water to move deeper into the soil.
A quick sprinkler cycle may make the grass look wet. However, that does not necessarily mean water has reached the roots.
Longer, less frequent watering encourages roots to grow deeper. Consequently, the lawn becomes better equipped to handle periods of summer heat.
You can check your watering depth with a simple rain gauge or small containers placed around the lawn.
This also helps you determine how much water your irrigation system actually delivers. Different sprinkler systems can apply very different amounts of water during the same period.
For example, one system could deliver an inch of water quickly. Another might require considerably more time.
Therefore, watering by inches of water rather than minutes provides a much more accurate approach.
Watch for Runoff on Tennessee Clay Soil
Many properties in Middle Tennessee have heavy or compacted soil. As a result, water may not soak into the ground as quickly as expected.
If water begins running onto the driveway, sidewalk, or street, stop the irrigation cycle.
Instead, use shorter watering cycles with breaks between them. This gives the soil time to absorb the water before more is applied.
This technique is especially useful on slopes and compacted areas.
Most importantly, additional sprinkler time does not help if the water is running away from the lawn.
Bermuda, Zoysia, and Fescue Have Different Watering Needs
Not every Tennessee lawn responds to August heat the same way.
- Bermudagrass is a warm-season grass that handles summer heat very well. Established Bermuda lawns can also tolerate relatively dry conditions.
- Zoysiagrass is another warm-season option with good heat and drought tolerance once established.
- Tall fescue, however, is a cool-season grass. Therefore, Tennessee summers can be particularly stressful for fescue lawns.
Fescue may require more attention during extended periods of high temperatures and limited rainfall. Still, excessive watering is not the solution. Deep, properly timed irrigation is more beneficial than constantly keeping the lawn wet.
Don’t Forget to Count Rainfall
Your lawn does not care whether its water comes from a sprinkler or a thunderstorm.
Therefore, rainfall should always count toward your weekly watering total.
A simple rain gauge can make this much easier. After a storm, check how much rain your property received before running the irrigation system again.
Rain sensors can also prevent automatic irrigation systems from running unnecessarily after significant rainfall.
This small adjustment can conserve water and help prevent overwatering.
Signs Your Lawn May Need Water
Rather than watering simply because it is Tuesday or Saturday, pay attention to your grass.
A lawn that needs water may begin to:
- Lose its bright green appearance
- Develop a dull or bluish-gray color
- Show footprints longer than normal
- Develop folded or curled grass blades
- Recover more slowly after being walked on
However, these signs do not always mean you need to dramatically increase irrigation.
First, check the soil. Then consider recent rainfall and the amount of water your sprinkler system is applying.
Can You Overwater Your Lawn in August?
Absolutely.
Because August is hot, homeowners sometimes assume more water is always better. Unfortunately, consistently saturated soil can create another set of problems.
Too much irrigation can contribute to shallow roots, fungal problems, runoff, and wasted water. It can also create conditions that favor certain weeds.
The goal is not to keep the lawn constantly wet.
Instead, provide enough water to reach the root zone. Then allow some time between watering sessions.
Check Your Irrigation System During Summer
August is also a good time to inspect your irrigation system.
A broken sprinkler head or poorly adjusted zone can leave one part of your yard dry while another receives too much water.
Look for:
- Broken or clogged sprinkler heads
- Water spraying onto sidewalks or driveways
- Areas receiving noticeably less water
- Sprinklers blocked by plants or landscaping
- Leaks or unusually wet areas
- Zones that overlap excessively
- Controllers that are still using an outdated schedule
Even a small irrigation problem can become much more noticeable during Tennessee’s summer heat.
Smarter Watering Makes a Healthier Tennessee Lawn
Water is essential during August, but more is not always better.
For most lawns, deep and less frequent watering is better than short daily sprinkler cycles. In addition, adjusting for rainfall can prevent unnecessary irrigation.
Your grass type, soil, sun exposure, and irrigation system will also affect the ideal schedule.
If your sprinkler system is not watering evenly, needs repairs, or could benefit from a more efficient setup, New Growth Landscaping can help. Our irrigation services can help homeowners keep their landscapes properly watered throughout the demanding Middle Tennessee summer.
A properly maintained irrigation system makes watering easier. More importantly, it helps deliver water where your lawn and landscape actually need it.
