There was a guy years ago taking spent coffee grinds from local coffee shops and doing essentially this, but growing blue oysters instead. I can’t seem to find

There was a guy years ago taking spent coffee grinds from local coffee shops and doing essentially this, but growing blue oysters instead. I can’t seem to find it now, but the idea of using such readily available waste was interesting to me and I’ve wanted to try it since. As I recall the coffee didn’t support as many flushes as wood chips or grain, but given that it was essentially free it seemed like it was still a good option. At any rate, this was great - mushrooms always get the gears turning. Some day I’d love to get something like this going. My family eats so many mushrooms.