Sounds like a good idea: Start your tomato seeds like this then put the whole thing in the ground when you plant them, the tomatoes will thrive off the egg shells (calcium--helping prevent blossom rot)
Garden Fertilizer Eggshells are rich in calcium and other minerals that help your garden thrive. Crush eggshells into tiny pieces and sprinkle into each hole before planting. Then, sprinkle additional shells around the base of your plants every two
Tub Cleaner - vinegar and dish soap, no scrubbing! Heat white vinegar in m'wave for 90 sec, pour int spray bottle. Shake gently to mix. Spray on surface, let it sit hours. Just wipe it away then rinse with water.