8 Easy Ways to Care for St. Augustine Grass (2026)

Key Takeaways

• Mow St. Augustine grass at 3.5 to 4 inches tall and never remove more than one-third of the blade in one cut; cutting too short causes weak roots, weeds, and brown patches.
• Water deeply about three-quarters to one inch per week, including rainfall, in one or two early-morning sessions rather than daily; use an empty tuna can to measure about an inch.
• Walk your lawn weekly to catch chinch bugs, fungus, and weeds early, since yellow or brown patches that keep spreading are easier to fix when caught soon.
• Use a slow-release fertilizer made for Florida lawns, check Hillsborough County's summer fertilizer ban (typically June through September) before applying, and keep fertilizer off driveways and sidewalks.
• Control thatch by mowing regularly and bagging clippings occasionally, and keep edges crisp and leaves cleared in fall so the grass does not smother or creep into beds and walkways.
• Expect St. Augustine to slow down or turn pale in winter; mow less often and avoid walking on frosty grass, since frozen blades break easily.

If you live in Riverview, Florida, there is a good chance your yard is covered in St. Augustine grass. It is the star of Florida lawns, and for good reason. It loves our heat, handles our humidity, and gives you that thick, lush carpet look. But even a tough grass needs a little love to stay healthy. Learning how to care for St. Augustine grass does not have to be hard or time-consuming.

Maybe you are a busy parent juggling work and soccer practice. Maybe you are a new homeowner who just got the keys and has no idea where the mower goes. Or maybe you are a retiree who would rather enjoy the porch than push a mower. Whatever your story, this guide is for you. We will walk through eight simple steps that keep your lawn green, thick, and strong all year long.

Let's get your lawn looking its best, one easy step at a time.

1. Know Your Grass Before You Start

St. Augustine is a warm-season grass with wide, flat, blue-green blades. It spreads by above-ground runners called stolons. This is what makes it fill in so nicely and form that dense, cushy turf.

It grows best in full sun to partial shade. That makes it a great fit for Riverview yards with big oak trees and mixed light. It does not love heavy foot traffic, so keep that in mind if you have kids or dogs who play hard.

Here is a quick look at what this grass likes and dislikes:

Knowing these basics helps you make smart choices about everything else on this list.

2. Mow at the Right Height

Mowing is the single biggest thing you can do for your lawn. Most people cut St. Augustine grass too short, and that is a common mistake. Short grass means weak roots, more weeds, and brown patches.

Aim to keep your grass between 3.5 and 4 inches tall. Taller blades shade the soil, hold in moisture, and help roots grow deep. Want to dig deeper? Check out our guide on the best mowing height for St. Augustine grass.

Follow the one-third rule too. Never remove more than one-third of the blade in a single cut. If your grass got too tall, cut it down in two rounds a few days apart.

• Keep your mower blade sharp. Dull blades tear the grass and invite disease.
• Change your mowing pattern each time to avoid ruts.
• Mow when the grass is dry for a cleaner cut.
• Let the clippings fall. They break down and feed your lawn naturally.

Not sure how often to mow? In Riverview's summer growing season, once a week is usually just right. You can read more about whether it is better to mow high or low if you want the full story.

3. Water Smart, Not Often

Many Florida homeowners water too much. St. Augustine does not need a daily soaking. In fact, too much water leads to fungus, shallow roots, and soggy soil.

The goal is deep, less frequent watering. Aim for about three-quarters of an inch to one inch of water per week, including rainfall. Split it into one or two sessions.

The best time to water is early morning, before the sun gets strong. This lets the water soak in before it evaporates, and it gives the blades time to dry out during the day. Our post on the best time to water your lawn breaks this down even more.

Signs Your Lawn Needs Water

• Blades fold in half or curl inward
• Grass takes on a bluish-gray tint
• Your footprints stay pressed in the grass after you walk on it

Signs You Are Overwatering

• Spongy, soggy turf
• Mushrooms popping up
• Yellowing blades or fungus patches

Here is a handy trick. Set an empty tuna can on the lawn while your sprinklers run. When it fills up, you have hit about an inch. Easy and free.

4. Watch for Weeds, Pests, and Disease

Even healthy lawns get visitors you did not invite. St. Augustine can be hit by chinch bugs, gray leaf spot, brown patch fungus, and grassy weeds. The earlier you spot trouble, the easier it is to fix.

Walk your lawn once a week. Look for yellow or brown patches that keep growing, thinning grass, or odd spots. Chinch bugs love hot, sunny spots near driveways and sidewalks. If you see yellowing that does not go away with watering, take a closer look at the base of the blades.

Here is what we tell neighbors in Riverview. The best defense is a thick, healthy lawn. Proper mowing, smart watering, and good airflow crowd out weeds and stop most problems before they start.

One honest note: All Trusted Lawn Care focuses on mowing and lawn maintenance. We do not offer fertilization, weed control, pest control, aeration, or soil care. But we are happy to connect you with trusted local partners who specialize in those areas. Our job is to give you the consistent cutting and upkeep that keeps your grass strong enough to fight back. For a look at common issues, see our list of 13 common lawn care problems and how to fix them.

5. Feed Your Lawn at the Right Time

Grass is a living thing, and it needs food. St. Augustine does best with a slow-release fertilizer made for Florida lawns. Timing matters here, and local rules matter too.

Many Hillsborough County areas have a summer fertilizer ban during the rainy season, usually from June through September. This protects our waterways from runoff. Always check current local rules before you apply anything.

A few helpful tips:

1. Test your soil first so you know what your lawn actually needs.
2. Choose a slow-release product with a Florida-friendly label.
3. Apply during the growing season, outside the ban window.
4. Water lightly after to move the food into the soil.
5. Keep fertilizer off driveways and sidewalks.

If you are an eco-conscious family with kids and pets, look for lower-impact options and follow label directions closely. A little goes a long way, and a greener choice protects your yard and the neighborhood.

6. Keep Thatch and Trimming Under Control

Thatch is the layer of dead grass and roots that builds up between the soil and the green blades. A little is fine. Too much blocks water, air, and nutrients from reaching the roots.

St. Augustine tends to build thatch more than some other grasses. Regular, proper mowing helps keep it in check. Bagging clippings now and then, especially if the grass got long, can also help.

Edging and trimming matter too. St. Augustine runners love to creep into flower beds, over sidewalks, and along driveways. A crisp edge keeps things neat and stops the grass from sneaking where it does not belong. If you want that polished look, take a peek at our post on why a lawn edging service is worth it.

Do not forget leaf cleanup. A thick blanket of oak leaves smothers the grass and blocks sunlight. Raking or blowing leaves off the lawn each week in the fall keeps your turf breathing. Our 11 lawn cleanup tips can help you stay on top of it.

7. Adjust Your Care Through the Seasons

Riverview has a mild climate, but your lawn still changes with the seasons. A little seasonal thinking keeps your St. Augustine happy all year.

Here is a simple seasonal guide:

In winter, St. Augustine slows down and may turn a little pale or go partly dormant after a cold snap. That is normal. Mow only when it needs it, and avoid heavy traffic on frosty mornings because frozen blades break easily.

For a full picture of how to keep things looking sharp all year, read how to keep your lawn looking great all year long.

8. Know When to Call a Pro

Here is the truth. Lawn care takes time, energy, and the right equipment. If you work long hours, have limited mobility, or just never learned the ropes, there is zero shame in getting help.

A reliable lawn service handles the weekly mowing, trimming, edging, and cleanup so you do not have to. That means consistent heights, sharp blades, and clean lines every single visit. Many homeowners find that hiring out is easier than they expected. See how the two options stack up in DIY lawn care vs. hiring a pro.

On average, lawn mowing in our area runs between $40 and $100 per cut. A monthly plan that includes weekly service typically lands around $180 to $220 a month, depending on yard size. All Trusted Lawn Care sits right around the middle, offering professional work and dependable results at a fair value.

We proudly serve Valrico, East Brandon, Bloomingdale, FishHawk, Boyette, and Riverview. Our crews know St. Augustine grass and the way it behaves in our neighborhoods. If you want to see what other homeowners think, read what our All Trusted Lawn Care customers say on Google. You can also check our standing with the Better Business Bureau, or follow along on Facebook.

A Quick Note for Different Homeowners

• Busy families: A set weekly schedule means one less thing on your to-do list.
• Seniors: Skip the heavy mowing and enjoy your yard from the porch.
• New homeowners: Get expert help while you learn what your lawn needs.
• Small businesses: A clean, sharp lawn boosts curb appeal and welcomes customers.

Curious about how your equipment plays into a healthy lawn? Even the humble lawn mower makes a big difference when it is sharp and set to the right height.

Final Thoughts: A Healthy Lawn Starts With Good Habits

Caring for St. Augustine grass comes down to a few smart habits. Mow tall, water deep, watch for trouble, feed at the right time, keep things tidy, and adjust for the seasons. Do those things, and your Riverview lawn will reward you with thick, green, soft grass you will be proud of.

And if you would rather spend your weekends with family than behind a mower, we have got your back. Contact us today for a free estimate, or give us a call at 813-833-1882. Let All Trusted Lawn Care keep your St. Augustine looking its best, week after week.

FAQs

Q: How often should I mow St. Augustine grass in Florida?

A: During the warm growing season, mowing once a week is usually perfect. In cooler winter months, you can stretch it to every two weeks or whenever the grass needs it. Just remember to keep it around 3.5 to 4 inches tall.

Q: How much water does St. Augustine grass need?

A: Aim for about three-quarters of an inch to one inch of water per week, including rain. Water deeply one or two times a week in the early morning instead of a little every day. Your grass roots will thank you!

Q: Why is my St. Augustine grass turning yellow or brown?

A: It could be too much or too little water, chinch bugs, fungus, or even a cold snap. Check the soil moisture first, then look closely at the base of the blades for bugs or disease. If the patches keep spreading, it is smart to get a local expert to take a look.

Q: Does All Trusted Lawn Care handle fertilizer or weed control?

A: We focus on mowing and lawn maintenance, so we do not offer fertilization, weed control, pest control, aeration, or soil care. The good news is we are happy to connect you with trusted local partners who specialize in those services. Meanwhile, we will keep your lawn cut, trimmed, and looking sharp.

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