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Out of the 2,000 or so species of mushrooms in North America, only 5 - 10 are deadly poisonous, and none grow in coffee grounds. If you get sick it's going to
by Alex3917 8y ago
Out of the 2,000 or so species of mushrooms in North America, only 5 - 10 are deadly poisonous, and none grow in coffee grounds.
If you get sick it's going to be because of bacteria or mould. But you can smell if your oysters are infected. They mycelium is supposed to smell like almonds or anise if it's healthy. If it instead has a foul smell then just toss it.
That said if you want to grow them at scale, I would use shredded newspaper rather than coffee grounds. Much easier to get.