You can get rid of slugs naturally using coffee grounds, but coffee isn't the best thing for some plants that slugs commonly snack on. However, that doesn't mean the secret to deterring slugs from taking over your garden isn't hiding in your kitchen, because there's another overlooked scrap that has the potential to reduce slug activity around your plants. Tea bags or tea leaves can be just as effective in treating a slug infestation in the garden. Tea bags are actually a common kitchen scrap that can deter all sorts of pests from your yard or garden, not just slugs. Second, dried tea leaves have an abrasive texture for slugs, so if the leaves are exposed on the soil, the slugs will avoid the area to avoid painful damage.