Answer: Mushrooms can indicate overly wet soil conditions, poor drainage, or something underground that's decomposing. Sometimes old tree roots or construction debris can be what's causing mushrooms to sprout in lawns and garden beds. The best defense for your lawn is to fertilize regularly, mow as often as necessary to keep the lawn about 2 - 2 1/2" tall, and water deeply once each week to encourage deep roots. For mushrooms growing in flower beds, simply pick them and discard before the disburse their spores. Digging the soil to incorporate more air will help your soil drain a little better.
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