What is Rosemary? Rosemary is a petite evergreen shrub, but there’s nothing small about the distinctive scent that wafts from its one-inch curved pine needles. A native of the sunny Mediterranean, rosemary is an aromatherapy star, culinary delight, and favorite ingredient in skin and hair products. Since 500 B.C., rosemary oil has been used to support overall health and wellness across cultures and traditions. Plant Part Used Sprig. Extraction Method Steam distillation. Aroma Strong, crisp & piney. Rosemary Essential Oil Benefits Elevates mood, energizes, and inspires. Stimulates mental focus and crystal-clear memory.