Eggshells are one of the greatest fertilizers available, especially for plants that are susceptible to blossom end rot, such as tomato's. The eggshells provide calcium, which is very important for the growth of the tomato's. Not only can you grow seedlings in the eggshells, but you can crush and powder the eggshells, and scatter them around your plants as a natural fertilizer. You can scatter coffee and tea grounds around also as a fertilizer.
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