Why Are There Dead Circles in My Lawn? Common Causes

Dead circles or spots have many causes. Check these common culprits:

• Dog urine: Pets (yours or neighbors') cause spots. Keep them off if possible. Repair by reseeding large spots; small ones fill in. Gypsum may speed recovery.
• Fungal disease: Seasonal, weather-dependent. Fall isn't typical for spread, but if it's the issue: apply fungicide for immediate cure. Long-term: healthy lawn (mow 2–3 inches, fertilize, water in summer) resists fungus. Track timing — summer hot/dry patches = fungus.
• Grubs: Larger, irregular patches. Dig in dead area — lots of grubs? Grass pulls up like rootless carpet. Apply grub killer per directions.
• Fairy rings: Most lawns have them. Green rings expand yearly; grass inside may die. Fungicide helps but tolerating is fine. Extra summer watering counters it.

Other possibilities: chemical spills (cleaners, motor oil), annual weeds dying in fall, misapplied weed control (overdose). Investigate your practices. Local extension offices or master gardeners can diagnose with a sample.