Short answer: For most people, the best rosemary oil for hair in Canada is a ready-to-use blend you can put straight on your scalp. Our pick is Plant of Life Rosemary & Castor Oil: $16.95 for 60 mL ($0.28 per mL), seven ingredients, castor oil first.
If you would rather mix your own, buy a pure rosemary essential oil and dilute it. The cheapest essential oils per mL in our comparison are Handcraft Blends and Majestic Pure, at $0.19 per mL on Amazon.ca.
Our pick: Plant of Life Rosemary & Castor Oil
$16.95 CAD for 60 mL (2 oz)
- Ready to use. Castor, jojoba, rosemary, peppermint, tea tree and lavender oils plus vitamin E. Nothing to measure or mix.
- Made with a blend of organic oils. Free from sulfates, soybean oil, parabens, silicones, preservatives and alcohol.
- Rated 4.9 out of 5 from 20 reviews on our store. Canadian seller, free shipping on orders over $49.
How we compared
We compared label facts and prices: size, CAD price, price per mL, organic claims, what is actually in the bottle, the bottle itself, and where Canadians can buy it. Prices were checked October 28, 2026 on each brand's own site, Amazon.ca and Well.ca. Prices move often, so check the listing before you buy.
Essential oil or ready-to-use blend?
This is the choice that matters most, and most "best of" lists skip it.
Rosemary essential oil is pure, concentrated oil from the rosemary plant. It is not meant to go on your scalp straight from the bottle. You mix a few drops into a carrier oil like jojoba, castor or argan first. It suits people who like to build their own blend or add drops to shampoo.
A ready-to-use blend already has the rosemary diluted in carrier oils. You part your hair, apply to the scalp, massage and leave it in. It suits anyone who wants a two minute routine with no measuring.
So price per mL is not apples to apples. A 118 mL essential oil at $0.19 per mL still needs a carrier oil before you can use it. A blend at $0.28 per mL is the finished product. Not sure which carrier to pair with an essential oil? See our guide to the best carrier oils for skin and hair.
Rosemary oils compared (prices in CAD)
| Product | Type | Size | Price | Price per mL | Organic? | Bottle | Where sold |
|---|---|---|---|---|---|---|---|
| Plant of Life Rosemary & Castor Oil | Ready-to-use blend | 60 mL | $16.95 | $0.28 | Blend of organic oils, USDA Organic seal on label | Amber dropper | plantoflifeco.com |
| Plant of Life Rosemary Essential Oil | 100% pure essential oil | 30 / 60 / 120 mL | $14.99 / $21.95 / $32.95 | $0.50 / $0.37 / $0.27 | Yes, sold as organic | Amber dropper | plantoflifeco.com |
| Plant of Life Scalp Activator Oil | Ready-to-use blend with batana | 60 mL | $29.99 | $0.50 | Certified organic (store listing) | Amber dropper | plantoflifeco.com |
| Mielle Rosemary Mint Scalp & Hair Strengthening Oil | Ready-to-use blend | 59 mL | $14.99 (Amazon.ca), $18.99 regular (Well.ca) | $0.25 / $0.32 | No certification on listings checked | Dropper, material not listed | Amazon.ca, Well.ca |
| Sky Organics Rosemary Strong Roots Oil | Ready-to-use blend, 3 ingredients | 60 mL | $21.99 | $0.37 | USDA Certified Organic | Not listed | Amazon.ca |
| Majestic Pure Rosemary Essential Oil | Essential oil | 118 mL | $21.99 | $0.19 | Not stated | Amber glass, dropper | Amazon.ca |
| Handcraft Blends Rosemary Essential Oil | Essential oil, steam distilled | 118 mL | $21.99 | $0.19 | Not stated | Amber glass, glass dropper | Amazon.ca |
| NOW Rosemary Essential Oil | Essential oil | 30 mL | $14.36 | $0.48 | Not stated | Not listed | Amazon.ca (third-party seller) |
| Saje Rosemary Essential Oil | Essential oil | 10 mL | $24.00 | $2.40 | Not stated | Not listed | saje.ca, Saje stores |
Best overall: Plant of Life Rosemary & Castor Oil
This is the one to buy if you want a rosemary routine you will actually keep. It is already blended, so you section your hair into four parts, apply a small amount to the scalp, massage and leave it in. Use it daily or three days a week and give it four weeks of steady use.
Castor oil is the first ingredient, with jojoba as the second carrier. Rosemary, peppermint, tea tree and lavender round it out. Seven ingredients total, no soybean oil, no preservatives. At $0.28 per mL it costs less than every blend in the table except Mielle on Amazon.ca.
Best organic essential oil for DIY: Plant of Life Rosemary Essential Oil
If you like to mix your own, this is 100% pure rosemary oil (Rosmarinus officinalis), sold as organic, in three sizes. The 120 mL bottle works out to $0.27 per mL. It is rated 4.89 out of 5 from 38 reviews on our store.
Mix a few drops into a carrier oil, apply to the scalp and massage. No rinsing needed. You can also mix it into shampoo or cream.
Best budget essential oil: Handcraft Blends or Majestic Pure
Straight talk: if the lowest price per mL is all you care about, these two win. Both are $21.99 for 118 mL on Amazon.ca, which is $0.19 per mL, and both come in amber glass with a dropper. Handcraft says its oil is steam distilled.
Neither listing makes an organic claim in its title. If organic matters to you, our 120 mL organic bottle costs $0.08 more per mL.
Best known name: Mielle Rosemary Mint
Mielle is the rosemary oil many shoppers already know, and it is the cheapest blend per mL in our table at $14.99 for 59 mL on Amazon.ca. It is a much longer formula, though. The Well.ca listing shows 29 ingredients with soybean oil first, plus water, glycerin and the preservative phenoxyethanol. If you want a short label with castor oil first, ours is the closer fit.
Best simple organic blend: Sky Organics Strong Roots
Three ingredients: rosemary oil, macadamia oil and jojoba oil, USDA Certified Organic. It is $21.99 for 60 mL on Amazon.ca ($0.37 per mL). Sky Organics directs you to leave it on for an hour and then shampoo, so it works as a pre-wash treatment rather than a leave-in. There is no castor oil in it.
Best premium scalp serum: Plant of Life Scalp Activator Oil
For people who want more than rosemary, this blend adds batana oil, peppermint, castor, pumpkin seed and hemp seed oil. The store lists it as vegan, certified organic and cruelty free. Apply 3 to 5 drops to the scalp, massage, and leave it in overnight or for at least 2 to 4 hours before washing. It is $29.99 for 60 mL.
Also on the shelf: NOW and Saje
NOW Rosemary Essential Oil is 30 mL for $14.36 on Amazon.ca through a third-party seller. Saje sells a 10 mL rosemary essential oil for $24.00, which is easy to grab in a Saje store but works out to $2.40 per mL.
What to look for when buying
- Know which type you are buying. "100% pure" means essential oil that needs diluting. A list of carrier oils means a ready-to-use blend.
- Read the first ingredient. In a blend, the first ingredient is the main base. Castor and jojoba are classic hair oils. Some blends lead with soybean oil.
- Compare price per mL, not sticker price. A small bottle can cost far more per mL than it looks.
- Look for an organic seal on the label, not just "natural" or "organic ingredients" in the marketing copy.
- Pick a dark dropper bottle. Amber bottles keep light out and a dropper makes it easy to hit the scalp, not your whole hand.
FAQ
Which rosemary oil is best for hair growth?
The best rosemary oil is the one you will use consistently. That is why we point most people to a ready-to-use blend: no mixing, so it is easy to apply several times a week. People use rosemary oil in their scalp routine for thicker-looking, healthier-looking hair. Read more in our rosemary oil for hair growth guide.
Can I put rosemary essential oil directly on my scalp?
Not undiluted. Pure rosemary essential oil is highly concentrated, so mix a few drops with a carrier oil such as jojoba or castor before it touches your scalp. If you do not want to mix, buy a blend like Rosemary & Castor Oil that is already diluted and ready to apply.
How often should I use rosemary oil on my hair?
Our directions for Rosemary & Castor Oil: use it daily as needed or three days a week, leave it in, and give it four weeks of steady use. At night, a hair wrap or light towel keeps oil off your pillow. Consistency matters more than the amount you apply.
Is Mielle rosemary oil good?
It is popular and cheap per mL on Amazon.ca. The trade off is the formula: soybean oil is listed first, and the Well.ca listing shows 29 ingredients including a preservative. If you prefer a short list with castor oil first and no preservatives, Plant of Life Rosemary & Castor Oil is the cleaner swap at a similar price.
Where can I buy rosemary oil in Canada?
Amazon.ca carries Mielle, Sky Organics, Majestic Pure, Handcraft and NOW, and Well.ca carries Mielle. Saje sells rosemary essential oil in its stores and at saje.ca. Plant of Life ships across Canada from plantoflifeco.com, usually in 2 to 5 business days, with free shipping on orders over $49.
Ready to start your routine?
If you want rosemary oil you can use tonight with no mixing, get Plant of Life Rosemary & Castor Oil for $16.95. Seven ingredients, castor oil first, made with organic oils. New here? Use code WELCOME10 for 10% off your first order, and every order is backed by our 30-day satisfaction guarantee.
