Top-selling Aura Cacia Lavender (Lavandula angustifolia) Essential Oil is the most popular essential oil, which is widely recognized for its aroma and many uses while the boxed packaging makes this essential oil great for gift giving. Lavender essential is generally considered one of the safest oils to use for adults and children, and scientific studies over the years have verified its many benefits. Lavender is harvested annually near or just after the summer solstice. The flowers only bloom for about two weeks, so the harvesting and distillation is often done all day and night. Lavender is harvested with a combine and immediately taken to the distillation facility.