Fairy ring appears in patches, rings, or arcs that are initially 1 foot or less in diameter. In landscape turf grasses, the most effective means for fairy ring control is to prevent the causal fungi from becoming established in the turf. Avoiding extremes in soil moisture (too wet or too dry) is very important to reduce the spread of fungi.
Proper fertilization and watering will gradually reduce Fairy Ring. The lawn should be irrigated early in the morning, between 4am-7am with 1” of water, once a week. Proper mowing is also very important, you should never cut more than 1/3 of the grass blade off at any time to avoid shocking the grass plant. Keep your lawn around 3” long to make sure your grass doesn’t start using its food reserves, which will impact how quickly it recovers.