crushed eggshells and coffee grinds?
my mother in law crushes about a dozen eggshells everyweek and mixes with used coffee grounds and sprinkles over everything in her garden. i thought i read somewhere that this would take away from the garden at first to break it down. she also puts banana peels around her rose bushes, (huge and beautiful so it must work) and she uses diluted spoiled milk to water her house plants. is she crazy like most in-laws or should i be doing this too? lol