Brown & Yellow Patches

What it looks like

Brow Patch appears as irregular circular patches of brown, tan, or yellow grass, 4 to 12 inches in diameter. These patches of dead and dying grass can enlarge and join. The patch perimeter may have a darker border of wilted grass that can be observed in the early morning. Mycelium may be present in wet conditions. In St. Augustine grass, the patch may be brownish in the interior with a yellow outer border ring. 

What is happening

Brown or yellow patches often occur when there are issues with watering, compacted soils, soil health, exposure to pet urine, or lawn disease.

Susceptible species: All major grass types. Especially prevalent in Bentgrasses, ryegrass, blue grasses, and St. Augustine.

Favorable conditions: High humidity, wet soil that drains poorly, excessive thatch, present between 60°-90°F; even more so between 80°-90°F.

What to do

  • Evaluate care practices to ensure your lawn is getting the right amount of water.
  • Deep and infrequent watering as needed to meet the plant’s needs.  
  • Water early in the day to encourage quick drying to reduce disease.   
  • In shaded areas, prune trees and shrubs to encourage air movement and increase light.  
  • Reseed or resod affected areas as needed in early fall or spring.
  • Add compost to reduce activity and spread of disease. 
  • Remove morning dew with a leaf rake or another tool.

Will Sunday nutrients help?

Many of the ingredients in our nutrient blends, like humic acid, seaweed, and molasses, will help heal yellow or brown spots. Together blends, remedy soil, promote resiliency, and help spur regrowth.

Our nutrients won’t grow new grass on their own and even healthy grass can be slow to fill in patches. Consider adding Patch Pro or one of our Hybrid Grass Seed blends to help fill in dead or bare spots and to prevent weeds from coming in.