The Q&A Archives: Controlling "Fairy Ring" Fungus

Question: We have, what the locals, call fairy rings in our yard. They are large rings, about 6 feet across, almost like ring worm if it were on people. We have not found any way to get rid of it. Do you have any ideas? We are at the 2,000 ft level in the Cascade mountains and have snow on the ground about 5-6 months out of year, and our soil is good but rocky. Our weather is dry in the spring and summer, and usually hot. We have to water daily in the summer. Any help would be apprecated. Judy Andersen Twisp, WA

Answer: Fairy ring fungus is common in lawns in your area because of the high rainfall. It actually a mushroom mycelia growing under the lawn that is causing the rings. You may eventually see mushrooms sprouting up around the ring usually in spring. The only sure way to control the mycelia as it spreads is to dig out the turf and soil around the ring line to 2' deep. This sounds drastic, but the mycelia can really spread. The other thought would be to stop watering the lawn, especially in spring, so not toencourage the fungus.

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