Save those eggshells! From a free calcium supplement for your chickens to slug control in the garden, they're valuable in so many different ways around the home. I normally just crush up all our eggshells and feed them free-choice to our chickens as an economical way to provide them the extra calcium they need to lay eggs with nice hard shells. But there are so many other practical uses for eggshells. 10 Practical Uses for Eggshells You might think eggshells are a waste. Read on to know how to use eggshells in 10 practical ways: 1. Eggshells as supplemental calcium source for your chickens Instead of buying commercial oyster shell, crush up all your eggshells and feed them free-choice to your chickens as an economical way to provide them the extra calcium they need to lay eggs with nice hard shells. 2. Vegetable or flower seed starter cups Eggshell halves make nice cups to start seeds in. You can just plant the whole thing in the ground when you’re ready to put them
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