7. Cover a plastic sheet over the growing piles, including 50 cm of the ground around the piles (don’t only cover the piles, as the mushrooms will not grow so much on the ground). Put 2 plastic sheets on top of the middle of the piles.
8. Cover the plastic sheets with straw. For summer, cover thickly while making the piles smaller, laying 1-foot apart and let air flow often. For winter, cover thinly and the piles should be made bigger,