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Is it OK to compost eggshells?
So, can you compost eggshells? Yes, you can compost eggshells, but they will decompose faster when ground into fine powder. Eggshells provide a good dose of calcium to soil, along with magnesium, potassium, and other trace minerals.
Can coffee grounds go in compost?
In short, the answer to “Can you put coffee grounds in compost?” is yes. Not only can you add coffee grounds to any composting setup, but you should. Coffee grounds are beneficial for your soil, and they're one of the easiest food wastes to compost.
Is eggshell good for plants?
The calcium from eggshells is also welcome in garden soil, where it moderates soil acidity while providing nutrients for plants. Eggshells contain such an abundance of calcium that they can be used almost like lime, though you would need a lot of eggshells to make a measurable impact.