Scotts DiseaseEx Lawn Fungicide for Lawn Care - Controls and Prevents Brown Patch, Pythium Blight and More as Listed, Treats Up to 5,000 sq. ft., 10 lbs.

What It Is

Scotts DiseaseEx Lawn Fungicide is a granular, broadcast-ready treatment for cool- and warm-season lawns. It controls and prevents common fungal diseases like Brown Patch, Pythium Blight, Red Thread, and Dollar Spot. This is not a mower part—it’s a lawn care product applied with a standard broadcast or drop spreader.

Fitment & Compatibility

Before buying, verify your grass type (e.g., tall fescue, Kentucky bluegrass, bermudagrass, zoysia) because some grasses (like bentgrass) may require reduced rates. Check your spreader setting: Scotts recommends setting #4 for rotary spreaders or #5 for drop spreaders (Scotts brand) or equivalent for other brands like Earthway or Lesco. This 10-lb bag covers up to 5,000 sq. ft. at the standard curative rate—adjust for prevention (lighter) or severe disease (heavier). No mower deck or brand compatibility needed; any spreader works.

Key Things to Know

• Quality: Active ingredient is Azoxystrobin (0.08%), a systemic fungicide with both preventive and curative action. Rated 4.4/5 from over 14,000 reviews—reliable for common lawn diseases.
• Installation Difficulty: Very easy. Just apply with a spreader, water in lightly (½ inch) after application. No mixing or spraying required.
• Gotchas: Do not apply to wet grass or before heavy rain—it can wash off. Keep off driveways/patios (stains concrete). Reapply every 14-28 days for active disease, or as a preventive in high-risk seasons (spring/fall). Avoid mowing 24 hours before or after.
• Timing: Works best when applied at first sign of disease or as a preventive during cool, wet weather. Not effective on all fungi—check label for full list.

Should You Buy It

Buy this if you have a cool- or warm-season lawn (2,500–5,000 sq. ft.) and are dealing with or want to prevent common fungal diseases like Brown Patch or Pythium Blight. It’s a solid, easy-to-use granular option for homeowners who want spreader-applied control without mixing or spraying. Skip it if you need a liquid concentrate, have a very small lawn, or are treating a specific fungus not on the label (e.g., snow mold).