Our reishi ready to fruit blocks are an easy way to grow an extremely medicinal mushroom! Reishi is easily grown “invitro” meaning in the bag with zero special requrements. Unfold your block when you recieve it, pull some air into the bag, and tape the slit in the bag closed. After that, place the block at room temperature and watch the magic unfold! Reishi takes 30 to 90 days to full develop!