keep shells in open container in fridge. When full, crush shells into small bits and sprinkle around base of plants. Sharp eggshells will deter slugs, snails, and other bugs from nibbling on garden and add touch of calcium to soil.
Potato Pot: The most environmentally friendly potatoes are grown this way. in Japan ! Make a potato pot by cutting out the sides of a plant pot and putting it inside another one - this makes it easier to lift the plants out for harvesting.