Tea Tree Essential Oil Melaleuca alternifolia Tea Tree (Melaleuca alternifolia) oil is very versatile, supporting healthy-looking skin and nails, neutralizing odors, and promoting the appearance of healthy hair and scalp.*Native to Australia, tea tree (Melaleuca alternifolia) is a compact tree that can grow to heights of 20 feet and is found along streams and wetland areas. Tea Tree essential oil is one of the most extensively studied essential oils and is widely regarded for its topical cleansing properties, with applications for skin, hair, and nails. Clean up your personal care and your home with Tea Tree oil!