Eggshells are the perfect vessels- they add valuable nutrients, such as calcium to your soil. Fast growing seedlings quickly deplete the surrounding soil of calcium, so the eggshells are not only cute, but beneficial.
bury a banana peel 1" down at the base of a rosebush. The potassium will feed the plant and help it fight of diseases. ***Used banana peels, egg shells, coffee grounds and crushed Tums with calcium when planting tomatoes 5-9-12. Sherry***