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Slime Mold

A harmless, oddball fungus-like growth that shows up on grass overnight and looks worse than it is.

Slime Mold
Photo: Lena Struwe via iNaturalist · CC BY-SA 4.0

What it looks like

Gray, black, white, or yellow crusty or powdery patches sitting right on top of the grass blades. It can look alarming, but it's just feeding on thatch and dead organic matter, not the living grass. The lawn underneath is completely fine.

Often mistaken for: Can look scary like a lawn disease, but it's a harmless surface growth, not something attacking your grass.

When it shows up in the Triangle

Pops up suddenly after warm, humid, wet stretches — can appear almost overnight during any warm season here in the Triangle.

Where you’ll see it

Can show up on any home lawn, regardless of grass type.

What you can do

  • Don't panic — this isn't hurting your lawn.
  • Mow over it to break it up and knock it down.
  • Hose it off with a strong spray of water if you want it gone faster.
  • No treatment is really necessary; it usually clears up on its own.
Related

Other lawn diseases

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