Lawn Problems
Brown patches, yellow spots, and torn-up turf
A struggling lawn always leaves a pattern, and the pattern is the diagnosis. Perfect circles suggest fungus, straight-edged stripes suggest a spreader or mower problem, random dead spots near where a dog runs suggest urine, and turf peeled back like carpet is the signature of grubs — or the raccoons and skunks digging for them. Before you buy a product, spend five minutes reading the damage. These guides show you what to look for, season by season, and when a patch is a cosmetic issue versus a sign of something spreading.
Lawn Problems guides
Armyworms in Lawn: Why Your Grass Turned Brown Overnight If a green section of your lawn turned brown in a matter of hours or a day or two, fall armyworms are a likely cause. These caterpillars chew grass blades and advance across turf in a marching front, leaving rapidly expanding brown patches. A simple soap-flush test confirms them, and acting quickly matters because the damage spreads fast. Read the guide → Brown Patches in Grass: How to Read What Killed the Turf Brown patches in your grass are most often caused by fungal disease, white grubs eating the roots, dog urine, or summer drought dormancy. The pattern is the diagnosis: circles point to fungus, turf that lifts like carpet points to grubs, and small spots ringed with dark green grass point to dog urine. Read the guide → Do I Have Grubs in My Lawn? 4 Signs and a Simple Test The clearest signs of a grub problem are turf that feels spongy and peels back like loose carpet, irregular brown patches that appear in late summer, and skunks, raccoons, or flocks of birds suddenly tearing at the lawn. The only way to know for sure is to lift a square foot of turf and count the white, C-shaped larvae underneath — fewer than five per square foot is normal, ten or more means it's time to act. Read the guide → Fire Ant Mounds in Your Yard: How to Identify Them A dome-shaped, fluffy pile of loose soil up to about a foot across with no visible hole on top is almost always a fire ant mound, especially in warm, sunny parts of the southern US. Ordinary ant hills have a central opening; fire ant mounds do not, and they swell or rebuild quickly after rain. Fire ants sting aggressively, so identify from a distance and never disturb a mound with bare hands. Read the guide → Grass Torn Up in Patches Overnight: Who's Digging and Why Grass torn up in patches — especially damage that appears overnight — is almost always an animal digging for grubs under your turf. Raccoons flip and roll back chunks of sod, skunks drill small cone-shaped holes, and crows peck and pull tufts by day. The digger is the symptom; the grubs underneath are the cause. Read the guide → Ant Hills All Over the Lawn: Which Ants, and What to Do A lawn dotted with ant hills is usually hosting turfgrass ants or field ants, which are more of a mowing nuisance than a threat. The critical exception is in the southern US, where dome-shaped mounds with no visible entrance hole can be red imported fire ants — an aggressive, painfully stinging species that changes the response from 'rake and relax' to 'treat and keep kids away.' Read the guide → Clover in Lawn: Why It Spreads and How to Stop It White clover spreads through a lawn mainly because the grass is hungry - low soil nitrogen, thin or scalped turf, compaction, and drought stress all give clover the opening it needs. Clover actually makes its own nitrogen, so it thrives exactly where grass is starving. The natural fix is to feed and thicken the lawn so the grass can outcompete it. Some homeowners even leave it on purpose. Read the guide → Dark Green Circles in Your Lawn: Fairy Rings and Other Causes A dark green circle or ring in your lawn is most often a fairy ring — an underground fungus releasing nitrogen as it grows outward — or grass feeding on something buried: a decomposing stump, old roots, spilled fertilizer, or a septic drain field line. Nearly all of these are cosmetic rather than a threat to the lawn. Read the guide → Lawn Dying in Patches Despite Watering? Find the Real Cause If dead patches keep spreading no matter how much you water, water was never the problem — something is attacking the grass or the soil beneath it. The most frequent culprits are grubs eating roots, chinch bugs along hot sunny edges, compacted or debris-filled soil, fungal patch disease, and dog urine. Each one leaves a distinct fingerprint you can check in minutes. Read the guide → Mole Crickets in Your Lawn: Signs, Tunnels, and Damage Raised, ridge-like soil trails that look like tiny earthquake fissures, turf that feels spongy underfoot, and spreading straw-colored patches usually point to mole crickets, especially in warm southern lawns. They tunnel just under the surface and sever grass roots as they go. A simple soap flush will drive them up so you can confirm before treating. Read the guide → Moss in Lawn: Why It's Growing and How to Get Rid of It Moss in a lawn is a symptom, not the disease. It moves in wherever grass is too weak to compete - usually because of deep shade, compacted or poorly drained soil, low soil pH, or turf that's been mowed too short and underfed. Raking the moss out only helps for a season; the lasting fix is correcting the condition that let it win in the first place. Read the guide → Orange Powder on Grass? It's Almost Always Lawn Rust That orange dust coating your grass — and rubbing off on shoes, mowers, and the dog — is almost certainly lawn rust, a fungal disease that shows up on slow-growing, underfed lawns in late summer. It looks alarming but is harmless to people and pets, and it usually clears up with a light feeding and better mowing rather than any fungicide. Read the guide → Sod Webworm Lawn Damage: Thinning Patches and Lawn Moths Scattered small brown patches with ragged edges that slowly enlarge over weeks are a classic sign of sod webworms. These small caterpillars chew grass near the base and hide in silk-lined tunnels in the thatch, and the little tan moths flitting up as you walk at dusk are the adults. A soap-flush test confirms them. Read the guide → Spongy Lawn That Lifts Up? Grubs, Thatch, or Moles Below A lawn that feels spongy underfoot or lifts up like carpet usually means one of three things: white grubs have eaten the roots, a thick thatch layer has built up under the grass, or moles are tunneling just beneath the surface. A simple tug on the turf and a look underneath will tell you which one you're dealing with. Read the guide → Yellow Spots in Lawn: Urine, Fertilizer, or Something Fungal? Yellow spots in a lawn most often come from dog urine, fertilizer burn, lawn rust, iron deficiency, or overwatering. Scattered spots with green rings point to a dog; stripes or spots that match your spreader pattern point to fertilizer; orange dust on your shoes points to rust fungus. Read the guide →
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