We really like that the diffuser can sit or hang anywhere you want to boost pest protection. The Stuarts also created a biodegradable, extra-large incense stick that uses the same repellent formula. Stick one in a flower pot or right into the yard. Both measures of protection cover about 200 square feet and are powered by a formula of lemongrass and geraniol oil—which is derived from geraniums—to fight bugs. We appreciate this great smelling and eye-catching natural approach.