Should I Put Coffee Grounds in a Worm Bin?
...is my takeaway. If and when someone studies the issue to determine a safe percentage, it would be unwise to recommend the practice, given the results of the referenced paper. Coffee grounds also form large anaerobic clumps worms don’t like. Clearly, they prefer vegetable scraps and large amounts of fluffy carbon material like cardboard and wood shavings. Now wouldn’t it be great if Elon Musk would fund local Extension Service home gardening resear...