How do you do eggshell fertilizer?

There are two ways to make an eggshell fertilizer. You can simply dry out and crush the eggshells and then bury them in the dirt around your plant (a few eggshells is all you need). Alternatively, you can boil eggshells in water, let them steep for about 8 hours, and then use the calcium-enriched water to water your plants.