Mushrooms in Lawns
Mushrooms, toadstools, or fairy rings are very common in lawns in the Greater Kansas City area. The fungi that cause these fruiting structures are several inches below the surface of the soil.
Many times circular bands of turf grass are darker green and faster growing than the adjacent grass of the same species. The bands of stimulated grass can range from four to 12 inches wide, and the diameter of the circles vary in size from three to 200 feet. One of the common characteristics of the fairy rings are the fruiting structures that may be very abundant throughout the circle. These toadstools, mushrooms, and puffballs are usually seen in the early spring or late fall.
Most of these fungi do not harm the lawn, but some people find them unsightly. These areas are known to expand if weather conditions favor the growth of the various fungi.
Controlling these fungi is very difficult. Neither spray applications of fungicides or drenches seem to be effective in controlling fairy ring. Remove mushrooms with a garden rake or a lawnmower for temporary control.
Mechanical removal of thatch and frequent aeration is suggested to help prevent these superficial growths.