Rosemary oil for hair: what it is, what it does, how we blend it
Rosemary oil is the most searched-for ingredient in hair oiling, and in a bottle it is one percent of the whole: the herb's sharp, green essential oil carried in jojoba, pumpkin seed and black seed in our Root Note blend.
| Role | Essential oil, fresh herbal family |
|---|---|
| On the label | Rosmarinus Officinalis (Rosemary) Leaf Oil |
| In our blends | Root Note 1% |
| Builder limit | Up to 1% of a hair blend (all essential oils together: 1%) |
What it is
Steam-distilled from the leaves of Rosmarinus officinalis, the oil is mostly 1,8-cineole, camphor and alpha-pinene, in shares that vary by where the plant grew. It is clear, thin and volatile: it evaporates, which is why you smell it, and why it is never used neat. In a hair oil it is a scent and a character, measured in half-grams, and the carrier oils are the bottle.
How it feels on hair
There is no weight class for an essential oil; at 1% it changes nothing about how the blend feels and everything about how it smells. Rosemary reads as fresh, green and slightly camphor-like, the herb on a cutting board, and it fades over an hour or two to a faint cleanness.
Who reaches for it
People looking for a rosemary scalp oil who want to know exactly how much rosemary is in it. Root Note carries it at 1%, the usual upper end for a scalp oil, over jojoba with pumpkin seed and black seed; the builder lets you set it lower.
Where it sits in our blends
Root Note carries rosemary at 1% (with Jojoba 78.5%, Pumpkin Seed 10%, Black Seed 10%). Open it in the builder, change any oil, name it and we weigh it for you.
How to compose with it
Essential oils share at most 1% of a hair blend between them, and the builder allows rosemary up to 1% on its own. It leads a scalp oil over jojoba or grapeseed with pumpkin seed and black seed; it also sits well with peppermint, tea tree or cedarwood as a second note.
Good to know: Strong oil. Keep it away from the eyes; the builder keeps the total under 1%.
Compose with rosemary Find your formula
Weighed to the gram and blended to order in New Jersey, with the recipe printed on the label. For external use only; patch test before first use. Every oil, with its INCI name, is in the oil library.