plant top of pineapple in pot. I did this about 5 months ago and thought it didn't work, but I went to through away the what I thought was dead pineapple plant and it is very much alive and healthy. This actually worked so far.
Each time you crack an egg open, instead of tossing the shell into the trash, drop it into an open container that you keep in the fridge. When the container is full, crush the shells into small bits and sprinkle them around the base of your plants. The sharp eggshells will deter slugs, snails, and other bugs from nibbling on your garden and add a touch of calcium to the soil. - Compost Rules.
20 Insanely Clever Gardening Tips and Ideas (with pictures!)