Brown Runners in St. Augustine: Causes and Fixes

Why Runners Turn Brown

Brown, dried runners usually mean the grass is water‑stressed. Roots come to the surface seeking moisture, then dry out and die. This is common with shallow, frequent watering (e.g., 15‑minute sprinkler cycles).

Deep Watering Protocol

• Water to 6+ inches depth using soaker hoses.
• Run 1 hour, off 1–2 hours, repeat until soil is deeply saturated.
• Test by walking: properly wet soil feels like soft carpet with padding.
• Water once weekly normally; add mid‑week soak only if temps exceed 100°F for several days.

Soil Health Boosters

Apply sugar (4 lbs/1,000 sq ft) to feed microbes. Sprinkle lava sand or alfalfa meal lightly for extra nutrients. If fungal issue suspected, use corn gluten meal (15–20 lbs/1,000 sq ft) or baking soda spray.

Read the Grass

St. Augustine folds its blades when thirsty. Broad blades = hydrated; folded blades = water immediately.