The lemongrass herb has stalks that are fibrous and smell much like lemons. In an essential oil, the scent is fresh and light with a hint of lemon. Lemongrass can be found in subtropical and tropical areas, where it thrives on fertile, well-drained, sandy and loamy soil that is exposed to direct sunlight and it's been used by healthcare providers to treat digestive problems and high blood pressure. It has many other potential health benefits, too. In fact, lemongrass essential oil is a popular tool in aromatherapy to help relieve stress, anxiety, and depression.