Brown Patch Fungus in Houston, TX: Fall and Spring Treatment
Brown patch is the most common fall lawn disease in Houston. Here is how to identify and control it.
Overview
When Houston nights cool into the 60s with morning dew sticking around past 9 AM, brown patch fungus shows up in St. Augustine lawns almost overnight.
What brown patch looks like
Circular yellow-brown patches several feet wide, often with a smoky outer ring early in the morning. The grass blades pull out easily at the base — that is the rot.
When it strikes Houston lawns
October–November and again in March–April are the peak windows. Cool nights, warm days, and prolonged leaf wetness drive the outbreak.
Treatment that works
A labeled fungicide application stops active spread. Reduce nitrogen during outbreaks, water early morning only, and avoid mowing wet grass — every wheel pass spreads spores across the Houston lawn.
Long-term prevention
Improve drainage in chronically wet zones, prune nearby trees to increase airflow, and skip late-fall nitrogen applications that push tender growth into peak fungus season.
Local resources for Houston, TX
Helpful authoritative resources for Houston, TX residents and property owners.