Why Is My Grass Turning Brown?

Brown grass isn't one problem — it's five, and the fix for one makes another worse. Pouring water on a fungus spreads it; watering a dormant lawn just wastes water. The trick is reading the pattern. Here's how to tell the five apart before you do anything.

1. Drought stress (whole lawn, gradual)

Uniform dulling that creeps in during dry heat, worst in sunny spots and near pavement. The classic test: footprints stay pressed down instead of springing back. This one's the easy fix — a deep soak revives it, and getting your watering right prevents it. Dial it in with the lawn watering calculator.

2. Dormancy (whole lawn, seasonal)

Sometimes brown is normal. Cool-season grass browns in summer heat; warm-season grass browns in winter cold — both are just dormant, not dead, and green back up on their own when the season turns. If your whole lawn went tan right on schedule with the weather, this is probably it. Which season applies depends on your grass — see cool- vs. warm-season grass.

3. Grubs (patches that lift like carpet)

Irregular brown patches in late summer that peel up easily — because grubs have eaten the roots underneath. The giveaway: the dead turf lifts with no resistance, and you may see fat white C-shaped larvae in the soil. Check the threshold and treatment window with the grub calculator before you spend on control.

4. Fungus (spreading rings or spots)

Circular patches, rings, or spots that spread over days, often after warm, humid, wet-at-night conditions. This is the one where more water makes it worse — fungus loves the damp. The fix is the opposite of drought: water less often and only in early morning so blades dry out, per the watering guide.

5. Dog spots (small, sharp-edged, dark rim)

Small round dead spots, often with a suspiciously greener ring around the edge — the signature of dog urine, where concentrated nitrogen burns the center and fertilizes the rim. Fix and prevent them with the dog spot repair calculator.

Read the pattern first

Whole-lawn and gradual points to drought or dormancy; patches that lift mean grubs; spreading rings mean fungus; small sharp spots mean dogs. Match the pattern before you reach for a hose or a bag — the wrong fix wastes money and can make it worse. For a guided walkthrough from your symptoms, the brown lawn diagnostic asks the right questions, and Lawn Care 101 covers the fundamentals that prevent most of it.