Tea tree oil is one of the most popular essential oils, one of the first ones new oil users try, after lavender essential oil. Tea tree oil, also known as Melaleuca oil, is made from a tree that grows in Australia. I was first introduced to tea tree oil several years back, when my husband had an issue with his feet and the solution he received to treat it had melaleuca oil in it. Do you have any idea how many uses this oil has? Lots!