Common lawn problems in Florida
“Most lawn problems have a cause you can fix — once you know what you’re looking at.”
A struggling lawn is one of the most common frustrations for Florida homeowners, and it usually has a specific, identifiable cause. Our heat, humidity, sandy soil, and year-round pests create a particular set of lawn problems — and once you can recognize them, most are manageable.
Here are the most common lawn problems we see across Palm Beach County, how to tell them apart, and what to do about each one before it spreads.
Chinch bugs
Chinch bugs are the number one pest of St. Augustinegrass here, sucking the juices from the blades and leaving expanding patches of yellowed, then dead, grass — usually in the hottest, sunniest parts of the lawn in the warm months.
The damage is easy to mistake for drought, so look closely for the tiny insects at the edge of a dying patch. Catching and treating an infestation early, and keeping the lawn healthy but not over-fertilized, is the best defense.
Fungal diseases
Our humidity breeds lawn fungus, with large patch and gray leaf spot among the most common, showing up as circular brown patches or spotted, thinning blades. Overwatering and evening irrigation are frequent culprits, since they leave the grass wet overnight.
The fix usually starts with cultural changes — watering only in the early morning, watering less often but deeply, and improving airflow and drainage. Correcting the conditions often resolves the disease without heavy chemical treatment.
Weeds
Weeds are often a symptom rather than the real problem, moving into a lawn that is thin or stressed for some other reason. Dollarweed, for instance, thrives in overly wet conditions and signals that an area is being overwatered or drains poorly.
The most durable weed control is a dense, healthy lawn that crowds weeds out, so addressing the underlying stress matters more than chasing each weed. Correct the conditions and many weeds fade on their own.
Weeds, thin spots, and brown patches are usually symptoms — fix the cause, not just the symptom.
Bare and thinning spots
Bare patches have many causes — too much shade, heavy foot traffic, pets, compaction, pests, or disease — so the key is diagnosing why before you reseed or re-sod, or the problem just returns. A spot that is bare from shade will not be fixed by more grass.
Identify the cause, address it, and then repair the area, or switch shaded and high-traffic spots to groundcover or mulch where grass simply will not thrive. We cover this in depth in our guide to bare spots.
Nematodes and grubs
Below ground, root-knot nematodes and white grubs damage grass roots, causing patches that wilt, thin, and pull up easily. These are harder to diagnose since the damage is out of sight, often masquerading as drought stress.
Healthy soil, proper watering, and not over-stressing the lawn help it withstand these pests. Persistent unexplained decline, especially where grass lifts away with no roots, is worth investigating for soil pests.
Prevention is the best cure
The thread through nearly all of these is that a properly watered, properly mowed, not-over-fertilized lawn resists most problems on its own. Many lawn issues are caused or worsened by overwatering, scalping, or excess fertilizer.
If your lawn is struggling and you are not sure why, bring us a photo and a description, and we can help you identify the cause and the fix. Stop by the nursery and we will help you sort it out.
Frequently asked questions
Why is my St. Augustine grass dying in patches?
In hot, sunny weather, the most likely cause is chinch bugs, which leave expanding yellow-to-brown patches often mistaken for drought. Look for the tiny insects at the edge of a dying area and treat early.
Why does my lawn have brown circular patches?
Circular brown patches usually indicate a fungal disease like large patch, encouraged by overwatering and evening irrigation. Water only in the early morning, less often but deeply, and improve drainage.
How do I stop weeds in my lawn?
Weeds usually invade thin or stressed turf, so the best control is a dense, healthy lawn. Address the underlying stress — like overwatering, which favors dollarweed — and many weeds fade on their own.
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