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It depends on what type of mushroom you have. You will have the specific temperature range for each mushroom in your instructions. For example, Pink Oyster mushrooms generally enjoy warmer temperatures around 18-22 C (64-72 F), while Blue Oysters do best in colder temperatures between 16-20 C (60-68 F). Room temperature usually works for most mushrooms unless it’s a hot summer day and you don’t have an air conditioner. In that case, try to find a fan that can cool down the air around the mushroom block without being directly positioned on it, or keep the block in the basement if you have one.

Mushrooms do not have chlorophyll, so they do not need light to make food. However, some indirect light helps orient and encourage the mushrooms to grow as they would outdoors. If you’re using artificial light, you should turn it off nightly, so the mushrooms do not dry up. We strongly recommend you do not have the mushroom kit in direct sunlight. It will heat the plastic and will be too hot for the mushrooms

If your window is in the shade, then it should be alright as long as you mist the mushrooms, keep the temperature within the recommended range, and follow our instructions and tips. However, you should not have the mushroom block in any direct sunlight. The mushrooms only need a bit of indirect light to help them grow – direct light will heat the bag. The mushrooms may also dry or grow differently if you have too much light or leave artificial lights on at night.