Mushrooms - Knowledgebase Question

Cheshire, Co
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Question by jobrienvt
July 18, 2009
What causes mushrooms to sprout in a healthy,thick lawn and what is the remedy?

Answer from NGA
July 18, 2009
Some mushrooms grow in decaying wood or tree roots under the soil surface, and others feed off grass roots, killing the turf. In either case, the only chemical-free way to control the mushrooms is to remove the mycelia (the stem of the mushroom body) from the soil. If rotting wood is the source of mushroom growth, remove it and the 2 inches of soil that surrounded the wood. If you have fairy ring fungi that grow in a circle, the fungus is feeding on your turf, and you'll have to remove the grass and 2 inches of surrounding soil as well. Excess moisture tends to encourage fairy rings, so water your lawn only as needed. There is no easy or inexpensive control of fairy ring fungi. The easiest strategy is to mask the effects by fertilizing the whole yard so that the impact of the nitrogen released by the fungi is not so visible. You could remove the sod within two feet of either side of the ring and replant with clean sod, but this seems a drastic solution to a minor issue.

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