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Make sure you know what they are. Most are relativly harmless, but some can be a problem. Those on the farm are known to be good to eat. I let my Thai partner take care of that. Lived there for years, knows what's what.

I will start farming mushrooms later once I get the appropriate enclosure built. There is always a good market for other types not found locally. And that way I know, without doubt, that they can be eaten safely.