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H substance is my yard. #937248

Asked June 29, 2026, 5:15 PM EDT

Looking to identify this blue gray is

Ionia County Michigan

Expert Response

Hello
 This is slime mold. If requires no treatment. You can brush, rake, mow, or rinse it off with a hose. If you use the hose, do so at a time when grass leaves will dry quickly in the sun. You don’t want grass standing overnight wet, or more fungi will be encouraged.
https://ohioline.osu.edu/factsheet/HYG-3074

https://www.canr.msu.edu/ipm/diseases/slime-mold

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