St. Augustine Grass Care: The Complete Central Florida Guide

If you have a thick, carpet-like green lawn in Lakeland or anywhere in Polk County, odds are you are looking at St. Augustine grass. It is the most popular warm-season turf across Central Florida for good reason: it is dense, shade-tolerant compared with most Southern grasses, and it forms a lush lawn that feels great underfoot. But St. Augustine is also a high-maintenance grass that punishes shortcuts. Mow it too low, water it on the wrong schedule, or miss the first signs of chinch bugs, and a beautiful yard can turn to straw in a matter of weeks. This guide covers everything that goes into real St. Augustine grass care in our climate, from picking the right variety to winning the fungus and pest battles that decide whether your lawn thrives.

Know Your Variety: Floratam vs Palmetto vs Seville

All St. Augustine is not the same. The variety in your yard changes how you mow, how much shade it tolerates, and how it handles our heat. The three you will run into most often around Lakeland are Floratam, Palmetto and Seville.

Floratam

Floratam is the workhorse of Florida lawns. It is a coarse, vigorous, sun-loving variety with wide blades and a fast spread. It performs beautifully in full Central Florida sun but is the least shade-tolerant of the three, so it thins out under dense tree canopy. It also wants to be mowed a touch higher than the finer varieties.

Palmetto

Palmetto is a semi-dwarf variety with a softer, finer texture and noticeably better shade tolerance than Floratam. For Lakeland yards with a mix of sun and oak or palm shade, Palmetto is often the better fit. It tends to hold its color well and recovers nicely from light stress.

Seville

Seville is a dwarf St. Augustine with a fine, low-growing blade and strong shade tolerance. It makes a dense, attractive lawn but is a bit more demanding and can be more prone to thatch buildup, so it rewards steady, knowledgeable maintenance.

Local tip: If you do not know which variety you have, look at blade width and growth habit. Wide, coarse blades that race across the yard in full sun are almost always Floratam. Finer blades doing well under partial shade point to Palmetto or Seville.

Mowing Height: The Single Most Important Habit

More St. Augustine lawns are ruined by the mower than by any pest. The rule in Central Florida is simple: mow high. For most St. Augustine, keep the cutting height at 3.5 to 4 inches. Floratam, with its coarse upright growth, is happiest near the top of that range.

Tall blades shade the soil and the grass crowns, which holds moisture, keeps roots cool, and crowds out weeds before they ever sprout. Scalping the lawn does the opposite: it stresses the grass, exposes the soil to weed seeds, and invites pests. Two more mowing fundamentals matter just as much:

• Never remove more than one-third of the blade in a single cut. If the lawn got tall, bring it down in stages.
• Keep the blade sharp. A dull mower tears St. Augustine instead of slicing it, leaving frayed, browning tips that open the door to disease.

For a full breakdown of cutting frequency through our long season, see our guide on how often to mow your lawn in Florida.

Watering St. Augustine in Central Florida

St. Augustine likes consistent moisture but hates staying wet. The goal is to water deeply and infrequently so roots grow down instead of staying shallow. A practical target is about three-quarters of an inch to one inch of water per session, applied early in the morning so the blades dry before evening.

Morning watering is not optional here. Watering in the evening leaves the lawn damp overnight, and overnight moisture in our humidity is exactly what fungus needs to take hold. Keep in mind that the water management district sets watering-day restrictions, so your schedule has to make the most of the days you are allowed. Our deeper guide on when to water your lawn in Florida walks through how to read your grass and stay within the rules.

Fertilizing for a Dense, Healthy Lawn

Our sandy Polk County soil drains fast and does not hold nutrients well, so St. Augustine needs steady, well-timed feeding rather than one big spring dump. The most common mistake is over-applying nitrogen in the heat of summer, which pushes soft, lush growth that chinch bugs and fungus love. A balanced, season-long program keeps the lawn dense without making it a pest magnet.

Timing matters as much as product choice, and Florida cities have nutrient ordinances that restrict fertilizing during the rainy summer months in some areas. For the full calendar built around our climate, follow our Florida lawn fertilization schedule.

Managing Thatch and Shade

St. Augustine grows by spreading stolons (above-ground runners), and over time a layer of dead and living stems can build up between the green blades and the soil. A little thatch is normal and even helpful, but a thick spongy layer blocks water and fertilizer, harbors pests, and holds disease. You can feel it: if the lawn feels bouncy and the mower scalps easily on bumps, thatch is likely the culprit. Keeping mowing height correct and avoiding excess nitrogen are the best ways to keep thatch in check.

Shade is the other quiet stressor. St. Augustine is the most shade-tolerant of our common grasses, but no variety thrives in deep shade. Under heavy oak or palm canopy the lawn thins, grows leggy, and gets more disease. Thinning out tree canopy to let in filtered light makes a real difference, which is one reason lawn health and palm and tree trimming go hand in hand. See our guide to palm tree trimming in Lakeland for how the two connect.

The Disease Battle: Brown Patch and Gray Leaf Spot

Two fungal diseases cause most of the heartbreak in Central Florida St. Augustine lawns.

Large Patch (Brown Patch)

Brown patch, now usually called large patch, shows up as roughly circular patches of yellowing, thinning grass, often a foot to several feet across, sometimes with a darker ring at the edge. It thrives in the mild, wet stretches of fall, winter and early spring when nights are cool and the lawn stays damp. The fixes are cultural first: water in the morning only, avoid late-season nitrogen, and improve drainage in low spots.

Gray Leaf Spot

Gray leaf spot is a hot-weather, rainy-season disease. It appears as small gray-to-brown spots on the leaf blades, often giving the lawn a scorched, off-color look in summer. Excess nitrogen and overwatering make it worse, so easing off the feed and the irrigation in peak summer is the front-line defense.

Chinch Bugs: The Number One St. Augustine Pest

If you see an expanding patch of yellow-to-brown grass in a sunny, dry part of the yard during the hot months, suspect chinch bugs before you assume drought. St. Augustine, especially Floratam, is their favorite target. They pierce the blades and inject a toxin, and the damage spreads outward in irregular patches that look like the lawn is dying of thirst even when it is being watered. Catching them early is the whole game. Our full guide to chinch bugs in Florida lawns covers how to confirm them and stop the spread.

St. Augustine Care Schedule (Central Florida)	What to Do
Winter (Dec–Feb)	Mow as needed at full height; watch for large patch in cool damp spells; minimal watering
Spring (Mar–May)	Green-up feeding; resume weekly mowing; begin chinch bug watch as heat builds
Summer (Jun–Aug)	Peak chinch bug and gray leaf spot season; water mornings only; go easy on nitrogen
Fall (Sep–Nov)	Final feeding before cool-down; watch for large patch returning; keep mowing high

Let a Local Crew Handle Your St. Augustine

Luxury Lawns USA is a family-owned, licensed and insured company based in Lakeland, FL, serving Polk County and a 50-mile radius including Plant City, Auburndale, Winter Haven, Bartow, Mulberry and Polk City. Owner Jordan Davis and our crew know exactly how St. Augustine behaves in our soil and heat, and we hold a 4.5-star rating across 39+ Google reviews. If your lawn is thinning, browning, or just not as thick as it should be, let us take a look. Request a free estimate or call us at (863) 279-7724 and we will walk your property and give you a straight plan.