My brother lives in Lancaster County PA and in his field there is a circle with mushrooms. What causes this circle? See pictures.
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Hello, and thanks for using the Ask an Expert System,
Your photos show a nice representation of a fairy ring or fairy circle. For a detailed description of how these fungal organisms grow read Fairy Rings from MushroomExpert.com
Lancaster County Penn State Extension
Replied September 13, 2017, 9:02 PM EDT