OtterKnow Kids Encyclopedia

Button mushrooms are the small, white, round mushrooms that you see at the grocery store all the time. They look like tiny white umbrellas with thick stems, and they are the most popular mushroom in the whole world! People have been growing button mushrooms for over 300 years.

Button mushrooms do not need any sunlight to grow, which makes them very different from plants. They grow best in dark, cool places in special soil made from straw and compost. Farmers grow them in big buildings that look like caves or tunnels!