Fixing Brown Spots in Lawns: Simple Cultural Fixes Before Diagnostics

Brown patches have many causes, but most respond to the same core cultural corrections. Try these first before investing in diagnostics.

Four Fundamental Fixes

• Dethatch if >½ inch: Thick thatch sponges water, starves roots, breeds fungi.
• Dial in irrigation: Most grasses need ~1 inch/week. Adjust for heat. Ensure drainage — no standing water.
• Sharpen mower blades: Dull blades shred tips → browning. Scalping dries crowns. If disease present, low mowing worsens it.
• Soil test before fertilizing: Target pH >6.0 and adequate nitrogen in early spring and when lawn looks poor. Apply only what test recommends.

Grass is resilient. Consistent, correct care resolves most brown spots without chemicals.