Large Brown Patches in South Carolina Summer: Brown Patch Fungus and Watering Fixes

Problem

Mid-summer large brown patches appear in Mt. Pleasant, SC lawn during hot weather.

Expert Diagnosis (Charlotte)

Likely Brown Patch fungus or shallow watering.

Immediate Treatment

• Saturate area with baking soda solution (dissolved in water) to soak root zone. Kills fungus.
• Switch to deep, infrequent watering: 1–2 times/week for 1+ hours to wet soil 6+ inches deep.
• Water early morning or evening to reduce evaporation.
• Use soaker hoses, not sprinklers (50%+ evaporation in 90°F+ heat).

Watering Wisdom

• Deep roots protect from heat, cold, drought.
• Shallow daily watering brings roots up—they die in heat, create thatch.
• Test moisture: walk lawn. Dry = hard floor. Wet 6" = soft carpet feel.
• In extreme heat (110°F+), water at night for maximum absorption.

Organic Advantage

Beneficial insects (toads, lizards, snakes) eat armyworms, grubs, aphids. No chemicals needed. Charlotte's asthma improved 90% after switching to organics.

Monitor for Armyworms

Check brown edges for tiny worms. Organic lawns rarely have issues.