The eggshells that I collected over the winter and pulverized have just been sitting in a plastic container. After checking my soil test and noticing the calcium levels in my soil were slightly above what’s needed, I was hesitant to put them into the garden.
The next choice was the chickens. But the shells are almost a powder, and that wouldn’t work free-choice. And I wouldn’t have a clue as to how much could safely be mixed with their feed.
Read more here: eggshells revisited | vegetablurb.