For the cultivation of grey oyster mushroom, wood can be inoculated either with plug spawn or grain spawn. The mushroom is considered as rapidly growing and extremely aggressive fungus. If inoculation is carried out early in the spring and wood is left in a warm and shaded place, mushrooms are expected to grow late in the autumn. Usually, mushrooms start growing when the environment temperature drops and precipitations are more frequent (most often during the fall). Cultivation on wood is most successful when carried out outdoors, where the spawn has enough fresh air and humidity to develop into mushrooms.