Mushrooms in New Lawn: Sign of Healthy Soil, Not a Problem

Lynn, MA homeowner: 80 yards screened loam + blue tag seed + starter fertilizer + lime applied last year. New lawn sprouts mushrooms; old lawn doesn't. Scott's says aeration/reseeding will fix. Owner wants mushroom-killing product.

Mushrooms = Healthy Soil

Forest-harvested loam contains active mycorrhizal fungi. St. Louis Dispatch: "Mushrooms indicate healthy soil good for trees/plants. They stop forming; mycelia live unobtrusively."

Not Fairy Rings

These are beneficial decomposers, not wood-decay fairy rings that persist decades.

Scott's Is Wrong

Aeration/reseeding won't affect mushrooms. More importantly: test soil pH (UMass Extension). Low pH from excess lime? Full test reveals needed corrections.

Don't Use Baking Soda

Old wives' tale. Destroys billions of beneficial fungi that suppress pathogens. Mushrooms are a positive sign—keep them.

Management

Rake every few days if unsightly. But reconsider: this is living soil doing its job.