The Ultimate Guide to Lawn Watering

Watering may seem like the simplest part of lawn care, but it can make or break your turf’s health. Grass needs water to survive and flourish but figuring out how much and when to water isn’t always straightforward. Grass type, soil condition and climate all play a role, and so do the watering habits you follow.

A proper watering plan not only helps your lawn look lush and green, but it also ensures your turf can make the most of other treatments like fertilization and aeration. That’s why TruGreen created this guide: to clear up confusion, set the record straight on common watering myths and share expert tips for healthier grass. 

When you water is just as important as how much.  

• Water in the early morning: Between 5 a.m. and 10 a.m. is ideal, allowing water to soak into the soil before the midday sun can cause evaporation.
• Avoid watering at night: Damp grass blades can stay wet for hours, creating the perfect environment for fungal or bacterial disease.
• Avoid watering at midday: Up to half of the water can evaporate in the heat, making this time inefficient for hydrating your lawn.

Just as important is how often you water. Shallow, frequent watering encourages weak, shallow roots. Deep, infrequent watering helps grass grow stronger roots that are better at withstanding drought and stress. 

With so much advice floating around, it’s easy to get confused. Let’s debunk some of the most common lawn watering myths:

Myth: Only water when your lawn turns brown.

Reality: By the time your lawn is brown, it may be in dormancy. Instead, water the grass when it looks dull or blue-green.

Myth: A healthy lawn shows footprints.

Reality: Healthy turf is springy and rebounds quickly. Footprints or mower lines that linger are a sign of dehydration.

Myth: Water during the hottest part of the day.

Reality: Up to half of the water can evaporate when it’s hot. Early morning watering is far more efficient and healthier for your turf.

Myth: Daily watering is best in extreme heat.

Reality: Lawns prefer deep, less-frequent watering. Too much can cause disease and weak roots. Aim for an inch per week, measured with a simple tuna can. 

1. Test soil moisture with a screwdriver: If it won’t easily push six inches into the soil, your lawn needs more water.
2. Use the tuna can trick: Run sprinklers until an empty tuna can fills to an inch, and that’s enough for the week.
3. Pair with other lawn care practices: Watering works hand-in-hand with mowing, fertilization, aeration and weed control. Together, they create a healthier, more resilient lawn.