Diagnosing Brown Patches: Fungus or Grubs?

Identifying and Treating Lawn Damage Naturally

New homeowners often encounter mysterious brown, crunchy patches that don't look like normal winter dormancy. Two common culprits: fungal disease or grub infestation.

How to Tell the Difference

Cut a square foot of turf and peel it back. Count grubs—if you find fewer than 5–6 per spadeful, grubs aren't the primary issue. Irregular, expanding patches with a "scorched" appearance often indicate fungus, especially in cool, wet conditions.

Organic Treatments

• Agricultural cornmeal: Apply 10–15 lbs per 1,000 sq ft. It feeds beneficial microbes that suppress pathogenic fungi.
• Baking soda spray: Dissolve 2 heaping tablespoons per gallon of water. Spray affected areas and a margin beyond. Alters leaf surface pH, inhibiting fungal growth.

Both methods are safe for pets, children, and soil life. Repeat as needed and monitor recovery.