Oyster mushroom is not as popular as white button mushroom in the domestic market. A few units are cultivating it commercially for export market. Cultivation of this mushroom on commercial basis would be more profitable as compared to white button mushroom as capital costs are low. Species of Oyster mushroom are cheapest and easiest to grow among all the cultivated edible mushrooms. Cultivation does not require complicated substrate preparation technique as in case of button mushroom. The former can be grown on non-fermented, almost fresh plant residues (agri-wastes containing lignin and cellulose). Substrate preparation does not require controlled environmental conditions as in case of button mushroom.