Recent research (can't find it right now, sorry) suggests that coffee grounds should be composted first, they can inhibit growth and be harmful to worms if dumped straight onto soil.
Yeah I read the same thing, coffee grounds are good for vermi-composting if you've got a wormery, just be caffeine fiends.
@Dogs started
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Recent research (can't find it right now, sorry) suggests that coffee grounds should be composted first, they can inhibit growth and be harmful to worms if dumped straight onto soil.