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Reading brown like a pro
even + hot = drought/dormancy · tidy shapes = fungus peels up = grubs · green-ringed spots = dog · pavement strips = heat/salt
Brown is a symptom with five common causes and five very different cures — and the most expensive lawn mistake is treating the wrong one (fungicide on drought, water on fungus, grub killer on dog spots). The pattern plus the tug test sorts them in two minutes, free.
The one that isn't a problem
Summer dormancy — the whole-lawn even fade during an August scorcher — is cool-season grass protecting itself, and fighting it halfway is the worst option. Either water it back to green (the watering schedule does it with ~1 inch a week) or let it sleep with a half inch every 2–3 weeks ("keep-alive" watering — the cost calculator shows what that choice saves). Bouncing between the two stresses grass more than either.
After the diagnosis
Drought: water deep, mow tall. Fungus: stop night watering, bag clippings while active, fungicide only for repeat offenders. Grubs: count first, treat past threshold. Dog spots: flush and patch. And whatever it was, thin brown-prone turf usually traces back to soil — the soil test and an overseed are the durable fix once the immediate cause is handled.
Frequently asked questions
Why is my lawn turning brown?
The big five: drought stress (footprints stay pressed, whole sunny areas fade evenly), summer dormancy (uniform straw color, crowns still alive), fungus (defined patches or rings, often after humid nights), grubs (turf peels back like carpet), and dog spots (dead centers with dark-green rings). The pattern of the brown is the diagnosis — that's what this tool reads.
How do I tell dormant grass from dead grass?
Tug and look: dormant grass holds firm at the roots and shows white/pale crowns at the base that green up within 10–14 days of real watering or rain. Dead grass pulls up with little resistance and shows brown all the way down. Whole-lawn uniform browning in August is almost always dormancy, not death.
What does lawn fungus look like?
Shapes too tidy for chance: circular patches (brown patch — often with a darker 'smoke ring' edge in morning dew), straw spots with tan-centered leaf lesions (dollar spot), or literal rings of dark green and mushrooms (fairy ring). Fungus loves the combination of night watering, humidity, and heavy nitrogen — fix those before reaching for fungicide.
How do I check for grubs?
Cut three sides of a one-foot square where brown meets green, peel it back, and count the white C-shaped larvae. Under 5 per square foot is normal and ignorable; 5–10 is watch-and-water; 10+ (or turf that peels like a rug because roots are gone) is treatment territory.