Mycelium holds many solutions for the future of our planet and it is time to start re-thinking the way we see materials. Grown.Bio uses nature to create zero waste, biodegradable materials that are so custom that they can grow in any given shape..These materials were once alive, how amazing is that.. Growing materials with mycelium, the roots of fungus, is an innovative technology based on the principles of nature, which greatly contributes to the transition to a circular economy.