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Achieving the Right Balance : The right compost balance is about 2 to 3 parts browns to 1 part greens by volume. In practical terms this means adding 2?3 scoops of dry carbon-rich browns such as shredded paper or dried leaves for every scoop of coffee grounds or other nitrogen-rich materials.
https://www.gardeninginsteps.com/article/how-to-turn-coffee-grounds-into-rich-compost-in-5-easy-steps
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