Water your lawn less frequently to prevent the growth of mushrooms. Mushrooms thrive in moist environments, so if you keep your soil dry, mushrooms will tend to die out in the area.
Fertilize your lawn with a high-nitrogen fertilizer. Fertilizing keeps mushrooms at bay by speeding up the decomposition of the organic matter mushrooms feed on.
Remove food sources for mushrooms. Keep your yard clean of pet feces as well as rotting mulch, and grind down tree stumps.
Remove mushrooms as soon as you see them in your yard. If you pick them as soon as you see them start to grow, this may help eliminate the spores from spreading to other areas of your yard.