Mushrooms are growing in the yard because they are the fruiting bodies of fungi that live underground in the soil. These fungi break down organic matter such as buried wood, old tree stumps, decaying leaves, and other rotting material. The presence of mushrooms usually indicates healthy soil rich in organic matter. Mushrooms thrive in conditions with enough moisture, humidity, and shade. They often appear after rain or in damp, shaded, or poorly drained areas. Thus, mushrooms are typically a sign of a thriving underground fungal network playing an important role in soil health and nutrient cycling, rather than a problem for the yard. However, some mushrooms can be toxic, so it’s best not to touch or eat any unknown mushrooms in the yard. In summary:

• Mushrooms grow because of underground fungi feeding on organic matter.
• They indicate healthy soil with ample nutrients.
• Mushrooms need moisture, shade, and organic material to fruit.
• They appear suddenly after suitable weather conditions, such as rain.
• Their presence usually benefits the ecosystem by decomposing material and releasing nutrients.

If unwanted, mushrooms can be managed by improving drainage, reducing shade, aerating soil, removing debris like old roots or pet waste, and dethatching the lawn.