They can be stuffed, sautéed, and scattered on salads. But where do the mushrooms on your plate come from and how do they grow? “Many people believe that mushrooms must be grown in the dark, but that’s a myth,” says Curtis Jurgensmeyer, CEO of Miami, Oklahoma-based J-M Farms. Mushrooms are the edible fruit of fungi, which grow underground. While their lack of chlorophyll means mushrooms don’t need sunlight to grow, they don’t require darkness either.