COFFEE WASTE is a RICH SUBSTRATE you can grow mushrooms on – directly on the waste or use it in equal proportions with sawdust (not pine), shredded paper waste or other cellulose waste. If you handle the coffee waste and keep it from outside air and work with it as soon as you get it  you may  well be be able to use as is. We recommend you use our aggressive oyster mushroom strain Elm A at 3-5% wet weight or 5-10% dry weight spawn to substrate ratio.

Elm A oyster mushrooms are almost twice the size of my hand. Grow your own Super Food on coffee waste.

Elm A oyster mushrooms are almost twice the size of my hand. Grow your own Super Food on coffee waste.

You may find mushrooms from coffee waste substrate only may be a bit bitter.