Plug Spawn - Black Oyster MushroomsOur Black Oyster plug spawn is a great way to make use of tree stumps or logs lying around in your yard. Using our plug spawn and included instructions, inoculate your logs, and then sit back and watch the fungi grow! Can continue to produce for up to 5 years after inoculation. Instructions and pack of 100 Black Oyster mushroom plug spawn. Mushroom Mojo Black Oyster Plug Spawn ***These plugs must be used within 2 weeks of receiving them. If you cannot