The Black Pearl Oyster Mushroom Kit includes a five pound bag of Black Pearl Oyster mushroom mycelium growing on hardwood sawdust and soy hulls. The mycelium is the vegetative stage of the mushroom life-cycle; the mushrooms are the fruits. In the box you will also find instructions, a compostable tent, and chopsticks for supporting the tent (or eating your mushrooms). Each kit arrives ready to give way to the freshest Black Pearl Oyster mushrooms you can find. Just follow the instructions to bring forth homegrown gourmet mushrooms. The Black Pearl Oyster is a mushroom hybrid that was developed in Japan. It is robust and meaty like the King Oyster (Pleurotus eryngii) and forms in clusters like the Pearl or Blue Oyster (Pleurotus ostreatus).