Jul 9, 2019 10:40:00 AM | Herbal Studies 101: What Is Rosemary Good For? | ACHS

Enjoy these quick and helpful facts about one of our favorite botanicals: rosemary Rosmarinus officinalis (L.).


Image Copyright: ACHS. Photographed at the ACHS campus and Apothecary Shoppe in Portland, Oregon. 

In her delirium, Ophelia says to Laertes, “There’s rosemary, that’s for remembrance.” Indeed we often think of rosemary for memory: It turns out that Shakespeare did know his herbs. But in herbal studies, rosemary Rosmarinus officinalis has many other qualities to offer the budding herbalist. To kick off our new “Herbal Studies 101” blog series, enjoy these quick and helpful facts about one of my favorite botanicals: rosemary Rosmarinus officinalis (L.).

Rosemary-2Benefits of Rosemary

Rosemary has also traditionally been used to freshen breath when eaten, used as a hair rinse for fuller hair and to reduce dry scalp and dandruff, added to skin care it can help to nourish skin, and drunk as a tea for healthy circulation and to help with cramps and healthy digestion. 

Rosemary is most famously known for its support for memory and a clear mind. An increase in the speed of memory was also observed in a small-scale, randomized, placebo-controlled, double-blind study involving 28 older adults given a daily dose of 750mg of dried rosemary leaf powder.[1] Another larger-scale, randomized, placebo-controlled, double-blind study involving 144 participants demonstrated that exposure to rosemary essential oil (via inhalation) enhanced the overall quality of memory.[2] 

Some research shows rosemary essential oil has an antibacterial activity against a variety of bacteria[3],[4], including Staphylococcus aureus, a culprit responsible for skin infections, respiratory issues, and more than 500,000 deaths per year.[5]

How to Identify Rosemary

Rosemary is a shrub that can grow to over three feet high with branches of scaly bark. The leaves are needle-like, evergreen, and can grow to 1-2 inches long. The leaves are highly aromatic with a strong, pleasant, camphor-like scent. Rosemary flowers are small, pale blue or white. There are many varieties now available including trailing and upright varieties. 

Parts Used

The young tops, leaves, and flowers are all used in cooking and herbal studies. It is commonly distilled for it's essential oil. 

Rosemary CU

Image: Microscopic image of Rosemary. 

Culinary Uses

Rosemary is a staple of the Mediterranean Diet, and was found in most medieval kitchen gardens. It was believed that  where rosemary flourishes, the woman rules! 

Rosemary is a hearty, aromatic herb. Just rub a sprig of fresh rosemary between your fingers and inhale… you’ll smell the strong aroma from the volatile oil! Rosemary is a friend to chefs, and when used sparingly, can enhance the flavor of meat, sauces and soups, herbed butter or dip, pastries, and herbal iced teas and mocktails.

How Rosemary Got Her Name

The name “rosemary” comes from the Latin roots ros (dew) and mare (sea), which means “sea dew,” referring to the wild, rocky coast of the Mediterranean, its native habitat.

Other common names for rosemary: compass-weed, compass plant, polar-plant, and incisor. Incisor refers to the French use of burning rosemary with juniper Juniperus communis (L.) to cleanse the air. Rosemary + Juniper… sounds like a lovely, cleansing diffuser blend!


Harvesting Rosemary at ACHS

Native to the temperate climate of the Mediterranean, rosemary does best in dry, warm soil with lots of sun. In the ACHS garden, we grow the rosemary against a fence where it gets a lot of sun and heat and, as you can see in the photograph to the right, it loves it!

Tip: if you’re growing rosemary to distill essential oil, don’t use too much organic fertilizer, which can reduce the yield of oil.

Rosemary can be grown from seeds, cuttings, or layering. Layering or cuttings produce the fastest results.  

Rosemary is a perfect herb to grow in a planter in a sunny windowsill. With a kitchen herb garden, you’ll never need to buy fresh herbs again!

Distilling Rosemary Essential Oil

How to Use Rosemary

It’s as easy as adding a pinch of rosemary leave to your cooking! For a daily dose try rosemary capsules or try preparing a rosemary essential oil based blend for your diffuser for a clearer mind, faster recall and improved memory over all!

You can also prepare an infusion, tincture, tea, a poultice for direct application, diffuse the essential oil, and prepare DIY bath products and cosmetics.

Rosemary Recipe: Soothing, Restorative Hair Rinse

Rosemary Rosmarinus officinalis leaves: 1 ounce

Filtered water: 2 pints

Borax: 2 teaspoons

Prepare herb as a standard infusion. Steep for 20 minutes. Strain, and add borax. Let cool, and use as a hair wash. Borax is a preservative and water softener.

So, what is YOUR favorite way to use rosemary? Have a favorite recipe or DIY wellness tip with rosemary? Please share in the comments.

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About American College of Healthcare Sciences

ACHS-Building-ExteriorFounded in 1978, is a Portland, Ore.-based, accredited college offering online, on-campus, and study abroad integrative health education. With undergraduate and graduate degrees, diplomas, certificates, and continuing education units in integrative health, ACHS makes holistic health and wellness education accessible to a diverse community, including healthcare professionals, military students, stay-at-home parents, and lifelong learners. Specializations include aromatherapy, herbal medicine, holistic nutrition, and integrative health. ACHS is a Certified B Corporation® and was named two of 100 Best Green Workplaces in Oregon 2017 by Oregon Business magazine. ACHS is also accredited by the Distance Education Accrediting Commission (DEAC), which is recognized by the U.S. Department of Education and by the Council for Higher Education Accreditation (CHEA). In response to our commitment to service members, veterans and military spouses, ACHS has been designated as one of the top 16% of military-friendly institutions in the U.S. for nine years in a row. For more information visit

Disclosure of Material Connection: I am the Founding President of American College of Healthcare Sciences, the Institution that publishes this blog. However, all opinions are my own. This blog may contain affiliate links. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.”

This article is for informational purposes only. It is not intended to treat, diagnose, cure, or prevent disease. This article has not been reviewed by the FDA. Always consult with your primary care physician or naturopathic doctor before making any significant changes to your health and wellness routine.   


[1] Pengelly, A., Snow, J., Mills, S., Scholey, A., Wesnes, K., & Butler, L. (2012). Short-Term Study on the Effects of Rosemary on Cognitive Function in an Elderly Population. Journal of Medicinal Food, 15(1):10-17. Retrieved from:

[2] Moss, M., Cook, J., Wesnes, K., & Duckett, P. (2003). Aromas of Rosemary and Lavender Essential Oils Differentially Affect Cognition and Mood in Healthy Adults. Int J Neurosci., 113(1):15-38. doi:10.1080/00207450390161903

[3] Kivanc, M. & Akgul, A. (1986). Antibacterial Activity of Essential Oils from Turkish Spices and Citrus. Flavour Fragrance, 1:175-179.

[4] Montes, M.A., Wilkomirsky, T., & Bello, H. (1998). Antibacterial Activity of Essential Oils from Aromatic Plants Growing in Chile. Fitoterapia, 69(2):170-172.

[5] Kasper, D.L. (2007). Group A Streptococcus Epidemiology and Vaccine Implications. Clinical Infectious Diseases, 45(7):863-865.




Dorene Petersen, ACHS Founding President

Written By: Dorene Petersen, ACHS Founding President

Dorene is the Founding President of the American College of Healthcare Sciences (ACHS). She has over 45 years of clinical teaching and lecturing experience in aromatherapy and other holistic health subjects. She has presented papers on essential oils and clinical aromatherapy at the International Federation of Essential Oils and Aroma Trades Annual Conference (IFEAT) in California, USA; the Aroma Environment Association of Japan (AEAJ) in Tokyo, Japan; the Asian Aroma Ingredients Congress (AAIC) and Expo in Bali, Indonesia; the International Center of Advanced Aromatherapy (ICAA) at the WonGwang Digital University in Seoul, Korea; as well as the AAIC Expo in Kunming, Yunnan, China. Dorene is a founding member of the Aromatherapy Registration Council (ARC) and served as its chair until 2023. Dorene is also involved in the distance education community and has served as a volunteer, committee member, and standards evaluator for the Distance Education Accrediting Commission (DEAC). Dorene is a travel junkie, and has led ACHS Study Abroad programs to India, Indonesia, Greece, and Hawaii!