From the leaf of a tall grass native to Asia, Citronella essential oil has a crisp, fresh aroma. It is an ideal companion for camping, hiking, and anywhere else you might go to experience the beauties of nature. Applied topically, it can be soothing to the skin and scalp and, due to its levels of citronellal, it may also help to promote clean skin. Additionally, Citronella is known to help promote happy, positive feelings.