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Mushroom Growing Kit

Gardeners might enjoy this mushroom growing kit, but it didn’t quite deliver on its promises.

What We Learned

You can’t get any more local than food you grow yourself on spent coffee grounds. That’s the idea behind this mushroom growing kit, which claims to grow oyster mushrooms in as few as 10 days: Just cut into the cardboard box and spritz the coffee grounds, which are injected with mushroom spawn, with water twice a day. After harvest you can turn over the box and grow a second batch. W...