mushrooms - Knowledgebase Question

Erie, CO
Question by joatoy
May 14, 2007
I have a circle of mushrooms that popped up on my front line. what should I do about them?


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Answer from NGA
May 14, 2007

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Fairy ring fungus is common in lawns in your area. It is actually a mushroom mycelia growing under the lawn that is causing the rings. While there are many temporary methods to getting rid of lawn mushrooms, the only permanent solution is to remove their food source. Food sources for soil fungi can include: animal feces, decaying tree stumps, decaying tree roots, old mulch. Once all the food sources are exhausted, and the lawn soil infested with the mold spores is removed, your lawn mushroom problem will be permanently solved.

There are many temporary solutions, including cContinual removal of actual mushrooms and chemical removal of actual mushrooms. The above methods can be temporarily effective, but they can be time-consuming, and do not help in permanently getting rid of lawn mushrooms. The only way to permanently get rid of lawn mushrooms is to exhaust their food source, and remove all soil that may contain traces of the fungi. The mycelia can spread 2' deep. This sounds drastic, but the mycelia can really spread, so digging out all the affected soil to a depth of 2' is what is recommended by OSU.

You can also put your lawn on a regular feeding schedule, which will help it outcompete the mushrooms so the mushrooms won't be so noticable. Feed your lawn with a 3-1-2 ratio of NPK in April, June, September and late November to help it grow lush and thick.

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