Yarrow essential oil is distilled from Achillea millefolium, a strongly aromatic member of the Asteraceae family that has been valued in European herb traditions for centuries. The oil is known for its herbaceous, slightly spicy character and, in some distillations, a blue tone associated with chamazulene.

Traditionally, yarrow has been associated with protective herbal work, battlefield folklore, and soothing botanical preparations. In modern aromatics, it is appreciated for skin-focused formulas, resinous diffuser blends, and complex herbal perfumery.

Compared with softer floral oils, yarrow feels drier, greener, and more herbal. It is especially distinctive when used with frankincense, chamomile, cypress, or conifer oils.