Eucalyptus is a fast-growing evergreen tree native to Australia. It is an ingredient in many products, it is used to reduce symptoms of coughs, colds, and congestion. It also features in creams and ointments aimed at relieving muscle and joint pain. It is a great leave to burn or boil to infuse the air with its invigorating properties. Crushing up the leaves and adding them to other resins or herbs such as mint can create a very energetic formula.