The large white greenhouse mushroom (Leucocoprinus cretaceus) can catch you off guard when they pop up in your houseplants. Don't worry, they're not dangerous or harmful to your plants! This is a tropical mushroom that hops a ride in soil and plant matter to spread across the globe. This adaptable saprotroph grows in potted plants, planters, and greenhouses in cold places. In warmer regions, it will grow from woodchips and compost.
