- Skipping pasteurization of the substrate—this allows pests and bacteria to thrive.
- Using spawn that isn’t fresh or viable—always buy from trusted suppliers.
- Placing your bags in direct sunlight—mushrooms need humidity and low light.
- Overwatering or underwatering—this disrupts the growing process.
- Lack of ventilation—stuffy rooms lead to contamination.
Read our grow guide to avoid these problems from the start.