Wytwórnia Grzybni Poszwald was established by M. Sc. Piotr Poszwald, one of the leading scientast regarding mycellium, in 1980. After producing different kind of mushrooms for consumption, the company focused on improval of the mycellium Phlebiopsis gigantea to develop it as product to improve the state forests in Poland. This was a great succes and is the main product produced by the company at the moment. Pg-Poszwald has helped thousands of hectares of forests and made it healthly evironment  and ist exported to different countries in the world