Quick answer
Yellow grass in Los Angeles is usually caused by uneven watering, heat stress, mowing too short, or low nitrogen. Patchy yellow spots often point to sprinkler coverage gaps, pet urine, or grubs. Fix the water first, raise the mowing height, then fertilize.
7 common causes
Start with the most likely — and cheapest to fix:
- Uneven watering: dry spots where sprinklers don't reach
- Overwatering: soggy soil that suffocates roots
- Heat stress: summer heat waves, especially on slopes and near concrete
- Mowing too short: scalped grass can't protect itself
- Low nitrogen: the whole lawn fades to pale green or yellow
- Pet urine: small round yellow spots, often with green edges
- Grubs or fungus: patches that spread or lift up easily
Quick test: is it water?
Push a screwdriver into the soil. If it's hard to push in, the soil is too dry. If water squishes up, it's too wet. Then run your sprinklers and watch where the water actually lands — broken or tilted heads are extremely common.
How to bring the green back
Fix coverage gaps and water deeply but less often, early in the morning. Raise your mowing height. Once the lawn is watered correctly, a balanced fertilizer helps it recover. Reseed or patch areas that are fully dead.
Common questions
Rather have us handle it?
Send photos and get a clear price, usually the same day.
