Did you know you can get rid of slugs and snails with eggs shells? Spread crushed shells underneath and around your plants. Add more shells every week. Snails and slugs hate anything that is sharp or rough, so they will slink away when they get to the shells. Plus, there is a lot of calcium in eggshells, so youre adding natural fertilizer to the garden as well! Other textures that work include coffee grounds, coarse sand, sheeps wool, and Diatomaceous Earth.