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How to Water St. Augustine Grass: Guidelines and Tips (2023)

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how much water for st augustine grassAre you looking for the best way to water your St. Augustine grass? Knowing how much water is needed and when to give it can be tricky, but with the right tips and guidelines, you’ll have a lush lawn in no time!

This article will cover everything from watering frequency and amount of water required for newly installed or established St. Augustine Grass, as well as different watering considerations depending on the season.

We’ll also discuss signs of overwatering or underwatering this type of grass, what time of day is best for giving it a drink, different methods used to properly measure out its hydration needs, and some great tips on conserving moisture while providing optimal care.

So don’t wait – get started today so that your yard looks beautiful all year round!

Key Takeaways

  • Watering frequency for St. Augustine grass varies based on the season, with 3-4 times a week in summer, 1-2 times a week in autumn, and every 10-14 days in winter if the soil is dry.
  • Newly installed St. Augustine grass requires daily watering for the first 2 weeks and then 2-3 times a week thereafter.
  • Consider using efficient watering practices such as deep watering, using various watering methods, and measuring water to ensure 1 inch per week.
  • Overwatering and underwatering can be identified by specific signs, such as yellowing, fungus, puddles for overwatering, and brown patches, folded blades, and blue-gray color for underwatering.

How Much Water Does St. Augustine Grass Need?

How Much Water Does St. Augustine Grass Need
Based on the season, you’ll need to adjust your watering schedule to keep your St. Augustine lawn lush. In the heat of summer, water your St. Augustine three to four times per week. Aim to apply about one inch of water each time. The best time to water is early morning before the sun gets too intense.

Watering in the morning reduces evaporation and allows the grass blades to dry during the day, which helps prevent fungus.

As temperatures cool in autumn, reduce watering frequency to one or two times per week. In winter, you may only need to water every 10-14 days if it’s a dry season. Water just enough to keep the crowns of the St.

Augustine grass from completely drying out. Proper watering technique and adjusting for seasonal variations are key for water conservation and a vibrant St.

Watering Guidelines for Newly Installed St. Augustine Grass

Watering Guidelines for Newly Installed St. Augustine Grass
When installing new St. Augustine grass sod, proper watering is crucial for establishment and survival. For the first 10-14 days, you’ll need to water daily, applying 1 to 1.5 inches per watering.

Watering Frequency

You’ll want to water your new St. Augustine grass 2-3 times daily for the first 1-2 weeks after installation.

Water in the early morning and late afternoon to avoid evaporation.

Adjust the frequency based on the season; water less in cooler months.

Watch for signs of overwatering, such as fungus, and cut back if needed.

Consider using smart irrigation controllers to promote conservation.

Proper watering frequency for St. Augustine grass is crucial, especially in the early weeks after installation. Pay close attention to ensure your new lawn gets the hydration it needs to establish healthy roots and thrive.

Amount of Water

Take heart, my friend – your new St. Augustine sod needs lots of hydration to take root and thrive. Give it a good soak, about 2-3 inches of water spread over 1-2 days, and let those verdant blades drink their fill.

With attentive care in these early days, you’ll soon be welcoming a lush, vibrant lawn. Monitor soil moisture, as proper watering depends on your soil’s water holding capacity. Established lawns only need about 1 inch per week, so adjust watering times accordingly.

With wise watering, your grass will develop deep roots and drought resistance. Conserve this precious resource for a sustainable, thriving landscape.

Watering Guidelines for Established St. Augustine Grass

Watering Guidelines for Established St. Augustine Grass
You ought to irrigate mature St. Augustine grass with about an inch of water weekly. The ideal watering frequency for established St. Augustine depends on your climate, season, and soil type.

In peak summer, you may need to water 3-4 times per week to keep the soil consistently moist. In cooler seasons, reduce frequency to 1-2 times per week. The key is to apply about 1 inch per application, whether through rainfall or irrigation.

To determine if you’re watering adequately, use a rain gauge or tuna can to measure rainfall and irrigation amounts. Then, periodically check soil moisture by probing down 4-6 inches with a screwdriver.

Adjust your irrigation schedule and watering times to maintain ideal soil moisture. Proper irrigation keeps St. Augustine grass healthy through heat, drought, and activity. Consistent moisture prevents dormancy, deterioration, and vulnerability to pests and disease.

Watering Considerations for Different Seasons

Watering Considerations for Different Seasons
With St. Augustine grass, watering frequency and amount vary by season. For winter, reduce watering to 1-2 times per month; for spring, water 2-3 times per week; for summer, increase frequency to 2-4 times per week based on your soil; finally, for fall, water 1-2 times per week as the grass goes dormant.

Watering Guidelines for Winter

Since St. Augustine grass goes dormant below 68°F soil temperature, you should reduce watering to just 1-2 times a month during the winter.

  • Water early in the morning to avoid frost damage.
  • Check soil moisture before watering.
  • Adjust frequency based on winter precipitation.

Watering during the cold season ensures that your St. Augustine lawn stays sufficiently hydrated through dormancy without overwatering.

Watering Guidelines for Spring

Come spring, give your St. Augustine a drink 2-3 times weekly for lush, verdant growth. I know it’s tempting to set and forget your sprinklers, but mindful watering prevents waste and encourages deep roots.

Water about half an inch each session, scheduling early in the morning for efficiency. Moist, not soaked, grass is the springtime goal. Adjust as you assess moisture levels.

Watering Guidelines for Summer

During the summer heat, aim to water your St. Augustine grass 2-4 times per week, depending on your soil type.

  • Deep watering encourages longer roots and drought resistance.
  • Moistening the grass in the morning helps prevent fungus issues.
  • The frequency of watering in the summer depends on the soil; sandy soil requires more frequent watering.
  • To achieve drought resistance, it is necessary to water the grass deeply on a weekly basis once it is established.

Properly watering your St. Augustine grass during the summer ensures a healthy turf despite the heat. Adjusting the frequency and amount of watering based on the weather, soil type, and grass maturity helps preserve moisture and prevents fungus.

Adequate summer watering promotes the growth of deeper grass roots, resulting in a lawn that is resistant to drought.

Watering Guidelines for Fall

Cooler temperatures sneak in, so reduce watering for your St. Augustine to just once or twice weekly. The emphasis shifts to proper mowing, keeping the grass around 3 to 4 inches high to insulate the crown.

Your lawn still needs nourishment, so apply fertilizer while the soil holds warmth. Monitor the grass and increase watering to two times if the blades wrinkle. Seasonal care ensures the health and beauty of your lawn throughout the fall.

Proper mowing, feeding, and irrigation are the keys to maintaining a vibrant Augustine lawn.

Signs of Overwatering St. Augustine Grass

Signs of Overwatering St. Augustine Grass
You’ll notice your St. Augustine turning yellow and developing fungal issues if it’s getting overwatered. Excess moisture prevents the grass roots from getting needed oxygen, leading the blades to turn yellow.

You may also see brown or irregular dead patches as disease sets in. St. Augustine prefers about 1 inch of water per week, ideally delivered in light, infrequent waterings that saturate the first 4-6 inches of soil then dry out.

If you see puddles, muddy areas, moss, mushrooms, or heavy thatch buildup, it’s a sign to cut back on watering. Instead, let the top few inches dry between waterings so the roots grow deeper. This encourages a healthier, more drought-tolerant lawn.

Test the moisture by pushing a screwdriver into the soil; if it slides in effortlessly, hold off on irrigation. Aim for uniform soil moisture just below the surface. Proper water management promotes a lush St.

Signs of Underwatering St. Augustine Grass

Signs of Underwatering St. Augustine Grass
Dig what I’m layin’ down: Saving that thirsty St. Augustine calls for staying on top of signs like dried out, straw-colored blades and footprints that stick around.

  • Brown patches appearing in the lawn
  • Blades folding or curling lengthwise
  • Lawn turning blue-gray

These are telltale clues your grass is crying out for H2O.

When underwatering goes unchecked, St. Augustine gets stressed and vulnerable. It can lose its good looks, become disease-prone, or even die.

Don’t let it come to that in the Houston climate. Get ahead of the issue by adjusting your watering schedule. Give your lawn a good soaking at least once a week. Daily watering may be needed during hot, dry spells.

Your revived, vibrant grass will thank you for it.

Best Time of Day to Water St. Augustine Grass

Best Time of Day to Water St. Augustine Grass
Morning’s the best time to water your St. Augustine, bud. The droplets’ll have time to soak in before evaporatin’ in the day’s heat.

Here’s a quick comparison of morning vs evening waterin’ for St. Augustine grass:

Morning Watering Evening Moisture
Watering Efficiency Most efficient. Less water lost to evaporation. Less efficient. More water lost to evaporation overnight.
Grass Health Healthier grass. Absorbs water before hot sun. Wet grass overnight invites fungus.
Fungus Prevention Dries before nightfall. Low fungus risk. Stays damp overnight. Higher fungus risk.
Watering Needs Offsets daytime drying/heat stress. Less daytime drying since cooler.

So mornin’s the clear winner for St. Augustine grass, buddy. The moisture soaks in when the grass needs it most, with lower fungus risk. Your lawn’ll thank you for smart waterin’ in the A.M. That’s the ticket for healthy, vibrant grass.

Watering Methods for St. Augustine Grass

Watering Methods for St. Augustine Grass
When watering your St. Augustine lawn, it’s important to water deeply and infrequently. Apply about 1 inch of water so it penetrates 4-6 inches into the soil. This encourages deeper root growth.

Some options include:

  • Overhead sprinklers: Set sprinklers to deliver 1 inch of water across the lawn. Don’t allow runoff.
  • In-ground irrigation: Professionally installed systems allow flexibility in watering different grass areas.
  • Hand watering: Using a sprinkler on a garden hose allows precision watering of problem areas.

Morning watering is ideal as it prevents evaporation loss later in the day. Avoid afternoons.

Adjust frequency based on season, cutting back in cooler months. Proper watering methods keep St.

How to Properly Measure Water for St. Augustine Grass

How to Properly Measure Water for St. Augustine Grass
To accurately measure water for your St. Augustine grass, set empty tuna cans around the lawn and run the sprinkler until they’re full. This will help you determine how long to run your sprinklers to provide the right amount of water.

Here are the key steps to measuring and providing the proper watering for St. Augustine grass:

  1. Place 5-10 empty tuna cans in different areas of your lawn.
  2. Turn on the sprinkler for 15 minutes.
  3. Measure the water depth in each can and calculate the average.
  4. Determine how long to run the sprinklers to provide 1 inch of water weekly. For example, if the cans collected 1/4 inch of water in 15 minutes, you’ll need to run the sprinklers for 60 minutes to provide 1 inch of water.
  5. Adjust watering time as needed based on weather and season. More water is needed during hot, dry periods.

Properly measuring and providing adequate water is crucial for a healthy, vibrant St. Augustine lawn. Keep an eye out for signs of over or under-watering and adjust accordingly.

Tips for Conserving Water While Watering St. Augustine Grass

Tips for Conserving Water While Watering St. Augustine Grass
You could cut your water bill by setting sprinklers to target just the roots, not the leaves, as the grass drinks through its feet.

Here are 4 tips for conserving water while watering St. Augustine grass:

  1. Water early in the morning when evaporation is lowest. Avoid watering during the hottest part of the day.
  2. Use soaker hoses or drip irrigation to apply water slowly and directly to the roots.
  3. Set sprinkler timers for multiple short cycles instead of one long one. This allows more water to soak in rather than run off.
  4. Let grass grow slightly taller – 2 1/2 to 4 inches. Taller grass shades soil and needs less frequent watering.

Pay attention to signs of underwatering like footprints remaining visible. But overwatering wastes precious water. Focus water at the roots using efficient methods and appropriate schedules. Proper lawn hydration conserves water while keeping St.


It’s important to water your St. Augustine grass correctly. On average, the amount of water needed for an established lawn is one inch per week. For newly installed grass, two to three inches of water spread over one to two days is recommended.

Depending on the season, watering frequency may vary. In the winter, water less frequently, while in the summer, water more often. Watering your St. Augustine grass in the early morning is ideal, as it allows for better absorption and fewer disease and weed problems.

Additionally, use a method that conserves water, like drip irrigation or using a sprinkler timer.

With proper care, your St. Augustine grass will remain lush and healthy.

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Mutasim Sweileh

Mutasim is a published author and software engineer and agriculture expert from the US. To date, he has helped thousands of people make their yards lush and thick.