No, this is not required. Mycelium grows just fine in a dark place, and some daylight does not matter. Do not place the mycelium in direct sunlight, this will heat the substrate and it could dry out faster.
No, this is not required. Mycelium grows just fine in a dark place, and some daylight does not matter. Do not place the mycelium in direct sunlight, this will heat the substrate and it could dry out faster.