Should I Put Coffee Grounds in a Worm Bin?
...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 coffee grounds would be safe to use, I found myself agreeing with Raymond Eckhart who says, In the absence of peer reviewed literature...
