Coffee grounds, vegetable scraps (banana peels are great) and egg shells, throw em all in a blender, pour into garden. Nutrient packed fertilizer.
Essentially it is liquid compost. Have been doing this with great benefit I believe.
Another on this for the garden, if you are going to blend scraps, blend your plant trimmings too. They have spent a significant amount of energy and nutrients making what we just trimmed off, why not put it back in the ground for them to use again.
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