Brown Patch in November: Treat Organically or Wait?

Cool Weather Doesn't Kill Brown Patch Fungus

In many zones, Rhizoctonia survives winter in thatch. Treat now to prevent spring flare-up.

Horticultural cornmeal: 10–20 lbs per 1,000 sq ft. Feeds Trichoderma fungi that attack Rhizoctonia.
Baking soda spray: 1 rounded tbsp per gallon water. Spray affected areas + 2-ft margin.

Both are safe, inexpensive, and available at garden centers. Rake out dead tissue first for better contact.

Lawns: Brown Spots in Tall Fescue: Detective Work Before Treatment; Systematic Diagnosis of Brown Patches in Bermuda Grass; Brown Patch Fungus in St. Augustine: When Treatment Fails; Brown Patch Fungus: Treatment, Seeding Timing, and Prevention; Managing Brown Patch Disease in Lawns: Cultural Controls Over Chemicals; Diagnosing Brown Patches in New Sod: Overwatering and Fungus Management; Diagnosing and Managing Brown Patch and Dollar Spot: Why Fungicides Fail and Culture Works; Mid-Iron Bermuda Burn Spots in Phoenix: Fungus, Grubs & Organic Solutions; Brown Spot in Utah High Desert Lawn: Likely Fungus, Treat Organically; Brown Patch in a Young North Carolina Lawn: Cultural Management Over Fungicides

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