By Eucalyptus is an aromatic evergreen best known for its distinctive, refreshing leaves. Native mainly to Australia, the plant has a long history of traditional use and is now grown around the world for its foliage, timber, and herbal applications.
Eucalyptus benefits are often associated with respiratory comfort, oral care, and the naturally occurring compounds found in its leaves. The leaves can also be used in herbal preparations such as tea and steam, although proper preparation and safety are important.
In this guide, we’ll explore eucalyptus benefits and uses, what makes its leaves unique, how eucalyptus tea is prepared, possible side effects, and how to use the plant safely.
What Is Eucalyptus?
Eucalyptus is a large group of evergreen trees and shrubs in the Myrtaceae, or myrtle, family. More than 700 species are recognized, and most are native to Australia and nearby islands.
One of the best-known species is Eucalyptus globulus, commonly called blue gum. Its leaves have a strong, fresh aroma produced by naturally occurring volatile compounds, particularly 1,8-cineole (eucalyptol).
Eucalyptus leaves have traditionally been used in herbal preparations, while the trees themselves are grown for timber, pulp, ornamental foliage, and landscaping. Depending on the species, eucalyptus can range from a relatively small shrub to a towering tree.
The leaves are the part most closely associated with herbal use. They may be dried for certain teas and other preparations or processed to produce eucalyptus essential oil. However, the two forms are very different: essential oil is highly concentrated and requires additional safety precautions.
We’ll cover the leaves throughout this guide. For a deeper look at the concentrated oil, see our separate guide to the benefits of eucalyptus essential oil.
History and Traditional Use of Eucalyptus
Eucalyptus is native primarily to Australia, where different species have a long history of use among Indigenous Australian communities. Traditional practices varied considerably by region, community, and species.
European settlers later adopted some of these uses, and eucalyptus oil became commercially produced during the 19th century. Over time, eucalyptus trees were introduced to many other parts of the world for timber, pulp, landscaping, and oil production.
Even the plant’s name reflects one of its botanical features. Eucalyptus comes from Greek words meaning roughly “well covered,” referring to the cap-like structure that covers the developing flower bud before it opens.
Today, eucalyptus is grown worldwide, but its strongest botanical and cultural connection remains with Australia. Modern research has focused particularly on compounds found in the leaves, including 1,8-cineole (eucalyptol), while many of the plant’s historical uses remain part of traditional herbal practice.
Key Compounds in Eucalyptus Leaves
The distinctive smell of eucalyptus comes from aromatic compounds naturally produced in its leaves. Their exact composition varies by species, growing conditions, and how the leaves are processed.
The best known is 1,8-cineole, also called eucalyptol. It contributes much of the familiar cooling, camphor-like aroma associated with eucalyptus and has been studied for its potential effects on respiratory function and inflammation.
Eucalyptus leaves also contain flavonoids and other polyphenols, plant compounds with antioxidant activity. These compounds help protect the plant itself and are among the reasons researchers continue to investigate eucalyptus for possible health applications.
Other naturally occurring constituents can include terpenes such as alpha-pinene and limonene, although their concentrations differ considerably among eucalyptus species.
Most research on 1,8-cineole uses concentrated or standardized preparations. Those findings shouldn’t automatically be applied to eucalyptus leaf tea, which contains a different mixture and concentration of plant compounds.
Potential Benefits of Eucalyptus
Eucalyptus has a long history of traditional use, particularly for respiratory complaints and general wellness. Modern research has focused largely on 1,8-cineole (eucalyptol) and eucalyptus-containing preparations rather than on eucalyptus leaves alone.
Some potential eucalyptus benefits have scientific support, but the strength of the evidence depends heavily on the preparation being studied.
1. May Support Respiratory Comfort
Eucalyptus is probably best known for its association with breathing and congestion. The aroma of eucalyptus is commonly used in inhaled products, vapor preparations, and other remedies intended to make breathing feel more comfortable during a cold.
Clinical research has examined standardized 1,8-cineole preparations for respiratory symptoms. In one placebo-controlled trial involving adults with acute bronchitis, cineole was associated with greater improvement in a combined symptom score than placebo. However, the study tested standardized cineole—not eucalyptus tea or whole leaves.
Eucalyptus should therefore be considered a supportive option for temporary comfort—not a treatment for asthma, bronchitis, pneumonia, or other respiratory diseases.
2. Contains Antioxidant Plant Compounds
Eucalyptus leaves contain flavonoids and other polyphenols with antioxidant activity.
Antioxidants help protect cells against oxidative stress caused by free radicals. Laboratory research has demonstrated antioxidant activity in eucalyptus extracts, although this doesn’t tell us how much benefit a person receives from drinking eucalyptus tea or using other traditional preparations.
This is a good example of where promising laboratory findings should not be overstated as proven human health benefits.
3. May Support Oral Health
Eucalyptus-derived compounds are used in some mouthwashes and other oral-care products.
A systematic review of essential-oil mouthrinses found additional reductions in plaque and gingivitis when these products were used alongside regular oral hygiene. However, these studies shouldn’t be interpreted as evidence that eucalyptus leaves or homemade eucalyptus rinses produce the same effect.
4. Traditionally Used for Coughs and Colds
Eucalyptus leaves have traditionally been associated with coughs, colds, and stuffy noses. Warm herbal preparations and eucalyptus aromas may feel soothing when you’re under the weather.
However, eucalyptus does not cure the common cold or flu. Rest, fluids, and appropriate medical care remain more important, particularly when symptoms are severe or persistent.
5. May Have Antimicrobial Properties
Laboratory studies have found that eucalyptus extracts and some of their compounds can inhibit certain bacteria and fungi under experimental conditions.
These findings are interesting, but laboratory antimicrobial activity does not mean eucalyptus can treat an infection in people. More clinical research is needed before drawing that conclusion.
can treat an infection in people. More clinical research is needed before drawing that conclusion.
Eucalyptus Leaves and Tea
Eucalyptus isn’t usually thought of as a tea herb, but dried Eucalyptus globulus leaves are used in some traditional herbal preparations. The key is choosing leaves specifically intended for that purpose rather than picking foliage from an ornamental tree.
Can You Drink Eucalyptus Tea?
The European Medicines Agency recognizes dried Eucalyptus globulus leaf preparations, including herbal material used to prepare tea and inhaled infusions. These preparations should not be confused with eucalyptus essential oil, which is far more concentrated and should never be substituted for the leaves in a homemade drink.
Because different eucalyptus species and products can vary considerably, follow the preparation instructions provided with the tea rather than assuming that leaves collected from an ornamental tree are suitable for consumption.
How to Make Eucalyptus Tea
If you purchase eucalyptus leaves specifically sold for tea, preparation is simple:
- Measure the amount recommended on the package.
- Place the dried leaves in a cup or tea infuser.
- Pour hot water over them.
- Cover and steep according to the product directions.
- Strain the leaves before drinking.
Honey or lemon can be added for flavor if desired.
The resulting tea typically has a strong herbal aroma with slightly bitter, cooling notes.
What Is Eucalyptus Tea Used For?
Traditionally, eucalyptus tea has been consumed for coughs, colds, and respiratory comfort. A warm drink itself may also soothe a dry or irritated throat and help with hydration when you’re feeling unwell.
However, research specifically examining eucalyptus leaf tea in humans is limited. Studies involving purified 1,8-cineole or eucalyptus essential oil shouldn’t automatically be used as proof that the tea provides the same benefits.
A Note About Homemade Tea
Don’t make tea from an unidentified eucalyptus tree simply because its leaves smell like eucalyptus. With hundreds of eucalyptus species and significant differences between preparations, the safer choice is a commercially packaged product specifically intended for consumption.
And most importantly, never add eucalyptus essential oil to homemade tea or drinking water. Essential oil is a concentrated preparation with a very different safety profile from properly prepared leaf products.
How to Use Eucalyptus Leaves
Tea isn’t the only way people use eucalyptus leaves. Fresh and dried branches are also popular for showers, aromatic steam, floral arrangements, and home décor.
Fresh Eucalyptus in the Shower
Fresh eucalyptus branches are often tied into a small bundle and hung near the showerhead. Warm, humid air helps release some of the leaves’ aroma, creating the fresh scent associated with eucalyptus.
Keep the bundle out of the direct stream of water so it lasts longer, and replace it when the leaves become brittle or lose their fragrance.
This is primarily an aromatic experience. Claims that a eucalyptus shower can detox the body, cure a cold, or treat sinus infections aren’t supported by good clinical evidence.
Eucalyptus Leaf Steam
Dried leaves can also be placed in hot water to release their aroma into the surrounding air.
If you try this method, avoid leaning closely over boiling water. Steam burns can be serious, and there’s little reason to cover your head with a towel or place your face directly above a very hot bowl.
A warm shower or simply allowing an herbal infusion to release its aroma is a gentler option.
Dried Eucalyptus Around the Home
Dried eucalyptus is commonly used in:
- Floral arrangements and wreaths
- Sachets
- Potpourri
- Decorative bundles
Its muted green foliage can remain attractive after drying, although the fragrance gradually fades.
Can You Use Leaves From Your Own Tree?
For decoration, healthy leaves from an accurately identified eucalyptus tree can generally be harvested as needed.
For anything intended for drinking or another internal use, however, don’t assume that ornamental eucalyptus is suitable. Species, pesticide exposure, and growing conditions matter. Choose eucalyptus leaves specifically produced and labeled for their intended herbal use.
If you’re interested in diffusers, topical applications, or aromatherapy, remember that those uses generally involve concentrated eucalyptus oil rather than whole leaves.
Other Uses of Eucalyptus
Eucalyptus is useful far beyond traditional herbal preparations. Different species are grown around the world for their wood, aromatic foliage, essential oils, and ornamental value.
Common uses include timber and pulp production, floral arrangements, landscaping, soaps and personal-care products, household fragrances, and commercially produced essential oils.
Eucalyptus wood is particularly important in forestry because many species grow quickly and can be used for products ranging from paper pulp to furniture and construction materials.
The attractive foliage is also popular with florists. Varieties with rounded, silvery leaves are frequently used fresh or dried in bouquets, wreaths, and home décor.
Not every eucalyptus species is grown for the same purpose, however. A species selected for timber may differ considerably from one grown for ornamental foliage or essential-oil production.
Eucalyptus Side Effects and Safety
The safety of eucalyptus depends largely on which form you’re using and how you’re using it. Drinking a properly prepared leaf product is very different from handling concentrated eucalyptus essential oil.
Possible Side Effects
Eucalyptus products may cause irritation or allergic reactions in some people. Depending on the preparation and how it is used, possible reactions can include:
- Skin irritation or rash
- Nausea or digestive discomfort
- Headache or sensitivity to the strong aroma
- Coughing or respiratory irritation in sensitive individuals
Stop using the product if you develop an unexpected reaction.
Eucalyptus Essential Oil Requires Extra Caution
The most important distinction in this article is that eucalyptus essential oil is much more concentrated than eucalyptus leaves.
Swallowing eucalyptus oil can cause serious poisoning. MedlinePlus warns that eucalyptus oil can be harmful when swallowed in excessive amounts and lists serious neurological and respiratory symptoms among possible signs of overdose. Never substitute eucalyptus essential oil for eucalyptus leaves in homemade tea or other drinks. The concentrated oil has a very different safety profile from properly prepared leaf products.
For topical applications, dilution, and other essential-oil-specific precautions, see our complete guide to eucalyptus essential oil benefits and safe use.
Pregnancy and Breastfeeding
There isn’t enough reliable evidence to establish the safety of medicinal eucalyptus preparations during pregnancy or breastfeeding. If you’re pregnant or nursing, ask your healthcare provider before regularly using eucalyptus tea, supplements, or concentrated products.
Children
Young children can be particularly vulnerable to essential oils and other concentrated eucalyptus products. Use only products specifically labeled as appropriate for the child’s age and follow their directions carefully.
Medications and Health Conditions
If you take prescription medications or have a chronic health condition, check with your healthcare provider before using eucalyptus medicinally or taking concentrated eucalyptus products.
Eucalyptus shouldn’t be used as a substitute for prescribed medication or professional treatment.
When to Get Help
Seek prompt medical advice if eucalyptus use causes significant breathing difficulty, severe vomiting, unusual drowsiness, confusion, seizures, or another serious reaction.
If eucalyptus essential oil is swallowed, contact Poison Control or emergency medical services promptly rather than waiting for symptoms to develop.
How to Grow Eucalyptus
Eucalyptus is grown not only for its aromatic leaves but also for its attractive foliage. Some varieties can become enormous trees, while others can be maintained as smaller garden plants or grown in containers.
Before planting, check the mature size and cold tolerance of the particular species you’ve chosen.
Sun and Soil
Eucalyptus generally grows best in full sun, ideally receiving at least six hours of direct sunlight each day.
Good drainage is equally important. Most species prefer soil that drains freely rather than remaining wet for long periods. Once established, many eucalyptus trees tolerate relatively dry conditions, although young plants need more consistent moisture while developing their root systems.
Watering
Water newly planted eucalyptus regularly during its first growing season, allowing the soil to drain between waterings.
Established trees usually require less supplemental water, although their needs depend on the species, climate, soil, and whether they’re growing in the ground or a container.
Avoid keeping the roots constantly soggy.
Growing Eucalyptus in Pots
Smaller eucalyptus plants can be grown in containers, especially when young.
Choose a pot with drainage holes and place it in a sunny location. Container-grown plants usually dry out faster than those planted in the ground, so check the soil regularly.
Pruning can help maintain a compact shape and encourage the attractive juvenile foliage often used in floral arrangements.
Can Eucalyptus Survive Cold Winters?
Cold tolerance varies considerably among species. Some eucalyptus trees tolerate frost better than others, while many are poorly suited to prolonged freezing temperatures.
In colder climates, eucalyptus is sometimes grown as an annual or kept in a container that can be protected during winter.
Harvesting the Leaves
For decorative use, cut healthy stems with clean pruning shears and avoid removing too much foliage from a young plant at once.
If you intend to use eucalyptus medicinally, don’t automatically use leaves from a landscaping tree. Correct species identification and knowing whether the plant has been treated with pesticides or other chemicals are important.
For tea or other internal preparations, purchasing leaves specifically produced and labeled for that purpose is the safer option.
Eucalyptus Leaves vs. Eucalyptus Essential Oil
Eucalyptus leaves and eucalyptus essential oil come from the same plant, but they shouldn’t be treated as interchangeable products.
Eucalyptus leaves are the whole plant material. Depending on the product, dried leaves may be used for tea, aromatic preparations, or decorative purposes.
Eucalyptus essential oil, on the other hand, is produced by distilling the leaves and concentrating their volatile compounds. It contains much higher concentrations of compounds such as 1,8-cineole, which is why a small amount of essential oil can have such a strong aroma.
The European Medicines Agency maintains a separate monograph for eucalyptus oil, reflecting its different uses and safety considerations from eucalyptus leaf preparations.
| Eucalyptus Leaves | Eucalyptus Essential Oil | |
|---|---|---|
| Form | Whole or dried leaves | Concentrated distilled oil |
| Common uses | Tea, aromatic steam, decoration | Aromatherapy and formulated topical products |
| Concentration | Much lower | Highly concentrated |
| Can it be used for tea? | Only leaves specifically sold for tea | No |
| Can it be swallowed? | Follow directions for food-grade products | No — swallowing the oil can be toxic |
| Safety concerns | Depend on species and preparation | Requires considerably more caution |
The distinction also matters when looking at research. A study involving purified 1,8-cineole or eucalyptus essential oil doesn’t necessarily prove that eucalyptus leaf tea provides the same effect.
If your main interest is the concentrated oil, including its potential benefits, aromatherapy uses, topical application, and precautions, read our separate guide to the benefits of eucalyptus essential oil.
Frequently Asked Questions About Eucalyptus
What is eucalyptus commonly used for?
Eucalyptus is used for its aromatic leaves, traditional herbal preparations, ornamental foliage, timber, and essential oil production. In herbal wellness, it is best known for its traditional association with respiratory comfort and its use in some oral-care products.
Can you drink eucalyptus tea?
Some eucalyptus leaves are sold specifically for use as herbal tea. Choose a food-grade product intended for consumption and follow its preparation directions. Don’t make tea from an unidentified ornamental eucalyptus tree, and never substitute eucalyptus essential oil for the leaves.
Does eucalyptus help with congestion?
The aroma of eucalyptus is commonly associated with a feeling of clearer breathing. Research on 1,8-cineole, one of its major aromatic compounds, has also explored respiratory effects. However, eucalyptus does not cure colds, sinus infections, or other respiratory illnesses.
Can you put fresh eucalyptus in the shower?
Yes. Fresh eucalyptus branches are commonly hung near the showerhead, where warmth and humidity help release their aroma. Keep the branches out of the direct water stream so they last longer.
Are eucalyptus leaves and eucalyptus oil the same thing?
No. Eucalyptus essential oil is a highly concentrated distilled product, while the leaves are whole plant material. They have different uses and safety considerations and should not be used interchangeably.
Is eucalyptus safe for children?
Concentrated eucalyptus products, particularly essential oil, require extra caution around young children. Use only age-appropriate products according to their labels and ask a pediatric healthcare professional if you’re uncertain.
Can eucalyptus be grown indoors?
Young eucalyptus plants can grow in containers if they receive plenty of direct sunlight and good drainage. Because eucalyptus grows quickly, regular pruning and eventual repotting may be necessary.
Is eucalyptus poisonous?
The answer depends on the preparation and amount. Eucalyptus essential oil can cause serious poisoning if swallowed. Whole-leaf products also shouldn’t be consumed unless they’re specifically intended for that purpose. Keep concentrated eucalyptus products safely away from children and pets.
Final Thoughts on Eucalyptus
Eucalyptus has earned a lasting place in herbal traditions thanks to its aromatic leaves and distinctive plant compounds. Today, it’s used in everything from herbal preparations and oral-care products to shower bundles and home gardens.
Research has explored several potential eucalyptus benefits, particularly those associated with 1,8-cineole, but the evidence isn’t equally strong for every traditional use. Studies involving concentrated extracts or isolated compounds also shouldn’t automatically be applied to eucalyptus tea or whole leaves.
If you’d like to try eucalyptus, choose a product made for your intended use and follow its directions carefully. For tea, use leaves specifically sold for consumption. And remember that eucalyptus essential oil is a much more concentrated preparation with different safety considerations.
Used with those distinctions in mind, eucalyptus can be an interesting and practical herb to explore without overstating what the science currently supports.
References
- European Medicines Agency. Eucalypti folium — Eucalyptus leaf. European Medicines Agency. Eucalyptus leaf monograph
- Fischer J, Dethlefsen U. Efficacy of cineole in patients suffering from acute bronchitis: a placebo-controlled double-blind trial. Cough. 2013;9:25. PubMed: Cineole and acute bronchitis
- Stoeken JE, Paraskevas S, van der Weijden GA. The long-term effect of a mouthrinse containing essential oils on dental plaque and gingivitis: a systematic review. Journal of Periodontology. 2007;78(7):1218–1228. PubMed: Essential-oil mouthrinse systematic review
- MedlinePlus. Eucalyptus oil overdose. U.S. National Library of Medicine. MedlinePlus: Eucalyptus oil overdose
- European Medicines Agency. Eucalypti aetheroleum — Eucalyptus oil. European Medicines Agency. Eucalyptus oil monograph
