Should I Put Coffee Grounds in a Worm Bin?
...o suggest pre-composting coffee grounds for three weeks before adding to a vermicomposting bin. It should be noted that the study was looking at worm bins where the feedstock was entirely made up of spent coffee grounds. Adding a few coffee grounds to a home bin made up of a diversity of feedstocks is probably not going to kill the worms. But, in a discussion thread on the Garden Professor’s Facebook group speculating about what percentage of coff...
