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Indoor-grown Morels also have a better chance of a successful harvest because those grown outdoors compete against a high population of bacteria. Mushrooms in contrast require extremely specific parameters to grow and fruit. Growing Mushrooms At Home Enchanted Gardens White fuzz on the ends of logs will tell you that the mushrooms are growing. How to grow mushrooms indoors . Growing indoors allows you the grower to regulate the temperature to mimic the Morels required temperature. This process is similar to the previous one in this article but uses various tools that are more likely already around your home. All you do is add water. After 4-5 weeks transfer your colonized substrates or cakes to a fruiting chamber and wait for your mushrooms to grow. Depending on the mushroom strain and growing conditions the substrate will be completely colonized by the mushroom mycelium in 2-4 weeks. 2 Putting the coffee grounds in a cup. How to Grow Oyster Mushrooms Indoors Trac