Articles
Aug 21, 2026

Red Thread Fungus

Is your lawn suffering from red thread fungus? Discover how to identify this common turf disease, its causes, and effective treatment options with Lawn Cure to restore your lawn’s health and appearance.

Red Thread Fungus

Red thread lawn disease (aka Pink Patch) is a grass fungus we are seeing quite a bit as me move into our summer season.  Red thread is a fungal disease that is found in slow-growing, nitrogen-deficient turf grass such as bluegrasses, bentgrass, fescues, Bermuda grass and perennial ryegrass. The fungi are small, water-soaked spots that cover the leaf blade in a red or pink color. 

Most red thread develops when there is too much water on the top of the lawn,the soil quality is poor and/or the bottom of the roots are too dry. The best way to minimize Red Thread is by way of the following:

  • Don't water more than every 3 or 4 days per week.
  • Only water in the early morning hours.
  • Clean off your mower in between mowings...bag clippings for a while if Red Thread is severe.
  • You may need to add a little nitrogen to help combat the fungus, though too much Nitrogen can lead to a sister fungal disease, brown patch.  Seek professional advice on how much Nitrogen is the most beneficial.
  • A post-fungicide may help, but can be quite costly and is only warranted in truly severe cases. Seek professional advice.