Identifying and Treating Lawn Rust Disease

Orange-yellow spores on grass blades that rub off on shoes = lawn rust. Pustules appear in late summer/early fall during dry weather. Rust attacks slow-growing turf—caused by low fertility, heat/drought stress, or nitrogen leaching from heavy rain on sandy soils.

Cultural Fixes (No Fungicide Needed)

• Fertilize September and October with high-nitrogen fertilizer (e.g., 29-3-4).
• Water deeply, max twice weekly, 45–60 minutes per session, early morning.
• Avoid late-afternoon/evening fertilization.

Soil Testing

Test for phosphorus/potassium deficiencies. If low, use starter fertilizer (high P) or winterizer (high K) as needed.

Rust is cosmetic and self-limiting; proper nutrition and watering restore vigor.