Grow your own mushrooms! The Elm Oyster (Hypsizygus ulmarius) are a gourmet mushroom native to the woodlands of North America, Europe, & Asia. They are not a true oyster mushroom, but share many of their qualities, including their delicious flavour & desirable texture. They have mild flavours & aromas and can be slightly sweet. Our hardwood fruiting blocks are innoculated and allowed to partially myceliate prior to shipping. Watch as the mycelium cultivate your block, then slice open the wrap to allow the mushrooms to grow. Pick and eat as they develop. Delicious, succulent, and perfectly fresh.