The Sweet Fennel plant has an interesting and varied history. Its uses span back thousands of years with the Romans using it to treat ailments and the Greeks hailing it as a natural contraceptive in their attempts to control the population. In modern times, we have moved on from these ancient ideas, but Fennel is still considered as a plant bursting with beneficial properties for body and mind. Due to the potential risks caused by improper use, Fennel Sweet essential oil should only be used by professional Aromatherapists.