» Citrusy Pest Repellent

Also a great way to keep squirrels from digging your garden
Your lemon and orange peels have a chance to do double duty if you hang onto them and plant them in the garden. They will discourage rodents, as well as cats from digging in the garden.’

In winter, store them in the freezer and after the ground thaws  bury them about an inch under the ground throughout the spring and summer.