How can I successfully cultivate white mushrooms in potting soil?

To successfully cultivate white mushrooms in potting soil, you will need to create a dark, humid environment with proper ventilation. Start by mixing the potting soil with mushroom spawn and keeping it moist. Place the mixture in a container and cover it with a plastic bag to maintain humidity. Keep the container in a dark, cool place and mist it regularly. After a few weeks, you should start to see mushrooms growing. Harvest them by gently twisting and pulling them from the soil.