The Q&A Archives: I have hundreds of small gray mushrooms every morning on my new lawn. Marathon sod. Why?

Question: Too many gray mushrooms every morning. I've tried adjusting water. Did I get bad sod?

Answer: If the mushrooms are random or scattered rather than in a circle, they are probably growing because there's something underground that's decomposing. Usually an old tree stump, tree roots, or even leftover wood from construction are causes for mushrooms growing on the soil surface. You can dig up the debris, or you can just rake up the mushrooms before they mature and release spores (that will produce more mushrooms). Dispose of the mushrooms in the trash rather than tossing them into your compost bin. Mushrooms can also be a result of poor nutrition and poor drainage in your lawn. Rake to remove the mushrooms, then make sure you're not overwatering and that the soil drains well.

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