Egg shells can benefit your soil and tomato plants – Mike Hursey, July 8, 20115
…egg shells are 96 percent calcium carbonate, which will stop blossom end rot on tomatoes. They add calcium and nutrients that the tomato fruit needs.
This next part of the process I found interesting too. With eggs often being in the news for salmonella, this next step is also important from a health standpoint,
What is important, and something I am sure my grandmother didn’t do, is to roast your eggshells before you grind them. Because of salmonella they need to be put on sheet pans and put in a 180-degree oven for 20 minutes to kill this bacteria. After they have cooled, you then grind them in a blender until very fine. If you don’t want to use your blender, crush them as fine as you can.
I would invite you to read the article for a few other tips regarding egg shells and tomatoes.
Picture Source: Pixabay