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They might show up after a rainy spell or emerge in new sod. Or you might have a fairy ring surface in your yard. Whatever the situation, having mushrooms pop up in your lawn can be a nuisance, an eyesore and, if you have children, potentially dangerous. Learn why mushrooms appear and what you can do about them.
What are mushrooms?
Mushrooms are actually part of a fungus that grows underground, hidden from sight. The mushroom is the tip of a fungus iceberg, if you will – a clue that a large fungus lies buried in soil. Lawn fungi and their mushrooms do not harm a lawn. Mushrooms growing in grass are actually good guys in the ecosystem of your yard, breaking down organic material into nutrients your lawn can use.
A mushroom reproduces through spores, similar to seeds. The mushroom releases the spores, which spread by wind or water, to start a new fungal colony.
When most people hear the word "mushroom," they think of the typical umbrella-shaped one, which is sometimes called a toadstool. But you might also spot other types of lawn fungus, including puffball, shaggy mane, Japanese parasol or the oddly-shaped and smelly stinkhorn.