Although most soil has plenty of calcium, eggshells add extra calcium to plants without messing up the pH like lime often does in a garden. ... Extra compost like eggshells will make your tomato plants happy, thus making you happy in the long run.

How do you add eggshells to tomato plants?

When you plant your tomatoes, dig a deep hole, pull off the bottom leaves and plant half the stem in the ground, where it will grow auxiliary roots. Then crush the shells of a dozen eggs over top of the root ball, cover with compost or soil and that's it—no more blossom end rot.

Is egg shells good for tomatoes?

Eggshells also provide plants with other essential minerals, such as potassium and phosphorus. The addition of these potent nutrients helps maximize tomato harvest, increase the production of the aromatic oils that make tomatoes so flavorful, and reduce the likelihood of blossom end rot.