Tea Tree: History and Traditional Use

Tea tree oil comes from Melaleuca alternifolia, a small paperbark tree that grows wild in one corner of the world — the warm, swampy lowlands of northeastern New South Wales, Australia. Its history is unusual among healing plants. For most herbs the documented record is thin and scattered; tea tree's is short but unusually well-attested, and it turns on two firm anchors: a long Aboriginal tradition among the Bundjalung peoples of that region, and a single, genuinely documented scientific milestone in 1920s Sydney when a museum chemist measured the oil's germ-killing power and set off a small industry. This page tells that story honestly — what the records actually support, what is best understood as living tradition, and where popular accounts run ahead of the evidence. Traditional knowledge and folklore are described here as history and tradition, not as medical advice or proven fact.

Table of Contents

  1. The Plant and Where It Grows
  2. Bundjalung Aboriginal Tradition
  3. How It Got the Name “Tea Tree”
  4. Arthur Penfold and the 1920s Discovery
  5. Birth of the Tea Tree Oil Industry
  6. Wartime Use and Post-War Decline
  7. Revival, Standardisation, and Modern Science
  8. Research Papers and References
  9. Connections
  10. Featured Videos

The Plant and Where It Grows

The first thing to understand about tea tree is how local it is. Melaleuca alternifolia — one of several hundred species in the genus Melaleuca, the paperbarks and honey-myrtles of the myrtle family (Myrtaceae) — grows naturally in only a small area: the low-lying, marshy ground and watercourses of the far north coast of New South Wales and a sliver of adjoining southeastern Queensland. It is a modest tree or large shrub with narrow, soft, needle-like leaves and creamy bottle-brush flowers, and it favours the kind of swampy, periodically flooded ground that few other useful plants tolerate. Almost the entire human story of the plant unfolds within that one region, which is part of what makes its history so compact and traceable.

The leaves are the source of the oil. They are densely packed with tiny glands holding a volatile, strongly aromatic essential oil, and crushing or steaming a handful of foliage releases its sharp, medicinal, camphor-like scent at once. This is the substance behind every chapter that follows: the crushed leaf the Bundjalung peoples used, the leaf-infusion that European newcomers brewed, and the steam-distilled oil that a Sydney chemist later put under laboratory test. The plant's common name has caused endless confusion, so it is worth stating plainly up front: tea tree is not related to the tea plant Camellia sinensis that gives us black and green tea, and tea tree oil is not a tea and must never be drunk. The shared word “tea” is an accident of colonial naming, taken up below.

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Bundjalung Aboriginal Tradition

The oldest chapter in tea tree's history belongs to the Bundjalung Aboriginal peoples, whose Country takes in the northern rivers region of New South Wales where the tree grows. It is commonly said, and widely repeated in popular and reference accounts, that the Bundjalung used tea tree as a traditional medicine for a very long time — often phrased as “thousands of years.” That specific span should be read as an estimate rather than a dated fact: Aboriginal medical knowledge was carried orally, not in written records, so precise dates cannot be verified the way a published paper can. What is reasonably well documented through oral history and ethnobotanical accounts is the nature of the traditional use, and it is consistent across sources.

Traditionally, the leaves were crushed and the released oil inhaled to ease coughs, colds, and congestion; crushed-leaf pastes and poultices were applied to wounds, sores, insect bites, and skin infections; and the leaves were steeped to make an infusion drunk or gargled for sore throats and other complaints. Alongside these direct preparations runs a striking piece of place-based tradition recorded in oral histories and noted by reference sources such as Encyclopaedia Britannica: the existence of so-called “healing lakes” or healing lagoons. In low spots where tea tree grew thickly around the water's edge, fallen leaves and twigs were said to steep in the shallows over time, tinting the water a tea-coloured bronze and turning the pool into a naturally scented, soothing bathing place used for skin conditions and general healing. Some accounts hold that particular tea tree wetlands held deep cultural significance on Bundjalung Country.

This Aboriginal tradition is the genuine root of tea tree's reputation. Everything the European settlers, the chemists, and the modern laboratories later did with the plant grew, directly or indirectly, out of the observation — first made by the people who lived alongside it — that the crushed leaf of this particular swamp tree soothed and cleaned wounds and eased the chest. Readers should note that these are descriptions of traditional cultural practice, not modern clinical recommendations.

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How It Got the Name “Tea Tree”

The familiar name “tea tree” comes from the era of European contact and exploration, and it is regularly traced to Lieutenant (later Captain) James Cook's first Pacific voyage, which reached the east coast of Australia in 1770 with the naturalist Sir Joseph Banks aboard. The traditional account, repeated in many histories of the plant, holds that Cook and his crew brewed a hot, spicy, aromatic drink from the leaves of the local myrtle-family shrubs — using it in place of ordinary tea — and so the trees became known as “tea trees.” The name stuck and spread.

Two honest cautions belong here. First, “tea tree” was applied loosely by early colonists to a whole range of unrelated Australian shrubs with aromatic or tea-substitute foliage — most famously several Leptospermum species as well as the Melaleuca paperbarks — so the name is much older and broader than the specific medicinal oil tree Melaleuca alternifolia, and one should be careful about tying it to one exact plant or one exact cup of tea. Second, and worth repeating because the name invites the mistake: this “tea” has nothing to do with Camellia sinensis, the true tea plant of China and India. The colonial brew was a rough aromatic substitute, not real tea, and the modern essential oil is a concentrated, toxic-if-swallowed product that is not a beverage in any form.

What can be said with confidence is narrower but still real: Cook's 1770 voyage was the moment European naturalists first systematically encountered and recorded the flora of Australia's east coast (the expedition's botanical haul is why the landing place became known as Botany Bay), and the English common name “tea tree” for these aromatic shrubs descends from that early colonial period. The botanical species name alternifolia — “alternate-leaved” — came much later, from formal nineteenth- and early-twentieth-century botany.

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Arthur Penfold and the 1920s Discovery

If tea tree has a single genuinely documented scientific milestone — the kind of dated, published, attributable event that the rest of this page deliberately avoids inventing — it is the work of the Australian chemist Arthur de Ramon Penfold in the 1920s. Penfold was the economic chemist at the Technological Museum in Sydney (the institution later known as the Museum of Applied Arts and Sciences / Powerhouse Museum), where he was appointed curator in 1927 and director in 1948, and he made a systematic study of the essential oils of Australian native plants. He later served as president of the Royal Society of New South Wales (in 1935).

Penfold steam-distilled the oil from tea tree leaves and tested its germ-killing strength against the standard antiseptic benchmark of the day, phenol (carbolic acid), using the phenol-coefficient method then in use. He reported that tea tree oil was a markedly more powerful antiseptic than carbolic acid — figures of roughly 11 to 13 times the strength of phenol are quoted, the exact multiple varying with the source and the test organism. These findings were published with R. Grant in the paper The Germicidal Values of Some Australian Essential Oils and Their Pure Constituents, in the Journal and Proceedings of the Royal Society of New South Wales (volume 59), in 1925. The cited authors, title, journal, volume, and year are confirmed against a stable archival record (see References). Soon afterward, in 1930, the Medical Journal of Australia carried a report drawing medical attention to tea tree oil as a promising new germicide.

It is worth being clear about what this milestone is and is not. Penfold's phenol-coefficient figures were an early-twentieth-century laboratory measure of antiseptic potency, not a modern clinical trial, and the precise multiple should be treated as an approximate historical result rather than an exact modern claim. But the event itself — a named scientist, a published paper, a specific year, a measured result — is solid, and it is the hinge on which tea tree's history turns: it converted a regional Aboriginal and colonial folk remedy into a substance with a measured, publishable reputation, and that reputation built an industry.

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Birth of the Tea Tree Oil Industry

Penfold's results, and the medical interest that followed, turned tea tree oil from a bush remedy into a commercial product. Through the 1920s and especially the 1930s, a tea tree oil industry grew up in the northern rivers district of New South Wales — the only place the tree grew in quantity. In the early decades the oil was won by cutting the wild bush stands by hand: leaf and small branches were gathered from the natural swampy thickets, packed into rough field stills, and steam-distilled on or near the site, often in difficult, insect-ridden, seasonally flooded country. It was hard, labour-intensive work, and supply depended on access to the wild stands.

The oil found a domestic and export market as a general antiseptic and disinfectant. It was sold for dressing cuts, abrasions, and minor infections, used in soaps, gargles, and household preparations, and promoted on the strength of Penfold's germicidal figures — an Australian natural product with a measured advantage over the imported carbolic of the day. This first commercial era, built on wild-harvested oil of variable quality, established tea tree oil's place in the Australian medicine cabinet and set the stage for its role in the Second World War.

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Wartime Use and Post-War Decline

Tea tree oil's best-known chapter is its service in the Second World War. According to numerous accounts of the industry's history, the oil was valued by the Australian armed forces as a field antiseptic for wounds, cuts, and the skin infections and fungal complaints that plagued troops in hot, humid theatres, and it was reportedly included in the first-aid kits issued to soldiers and sailors. The same accounts hold that tea tree oil production was treated as an important wartime commodity — so much so that cutters and producers of the oil are commonly said to have been exempted from military call-up to keep the supply flowing. These wartime details are consistently and widely reported in histories of the industry; readers should note that they rest largely on this well-established popular and trade record rather than on a single primary archival citation cited here, and the broad outline — tea tree oil as a valued military antiseptic in WWII — is not seriously disputed.

After the war, tea tree oil faded. The arrival and mass production of penicillin and other antibiotics gave medicine cheap, powerful, reliable cures for bacterial infection, and a variable-quality wild-harvested plant antiseptic could not compete with them. Demand fell, the wild-cutting industry contracted, and for a generation tea tree oil slipped to the margins as a minor folk and household remedy rather than a product of serious commercial or medical interest. This is the same pattern seen with many traditional remedies in the mid-twentieth century: the antibiotic revolution, genuinely one of the great advances in human health, displaced the old plant antiseptics almost completely.

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Revival, Standardisation, and Modern Science

Tea tree oil's modern revival began in the 1970s and 1980s, driven by renewed consumer interest in natural and complementary products and by a crucial change in how the oil was produced. Instead of cutting wild bush, growers established Melaleuca alternifolia in cultivated plantations — planting it in dense rows, mechanically harvesting the foliage, and distilling it under controlled conditions. Plantation cultivation gave, for the first time, a reliable supply of consistent, better-quality oil, and tea tree oil grew into a substantial Australian agricultural and export industry supplying the global cosmetics, personal-care, and natural-health markets.

Consistency demanded a definition of quality, and this produced the second firm, dated anchor in tea tree's modern story: an international standard. The International Organization for Standardization published ISO 4730 for “oil of Melaleuca, terpinen-4-ol type” (first issued in 1996, revised in 2017), specifying the chemical composition required of genuine tea tree oil — most importantly a minimum of about 30% of the active component terpinen-4-ol and a low maximum for the more irritant 1,8-cineole. The standard exists precisely because the oil's reputation, and its safety, depend on its chemistry, and because adulteration and poor-quality oils were a real market problem.

The scientific thread that Penfold began in 1925 was, meanwhile, picked up in earnest. From the 1990s onward, Australian researchers — notably the group of Carson, Hammer, and Riley — subjected tea tree oil to modern laboratory and clinical study, and their comprehensive 2006 review in Clinical Microbiology Reviews remains the most-cited modern summary of the evidence; an updated review appeared in 2025. Clinical trials examined the oil in conditions such as acne, where a well-known 1990 Australian study compared a 5% tea tree oil gel with benzoyl peroxide. Modern systematic reviews of the human trial evidence have since tried to weigh what is genuinely established from what is merely traditional. That same modern era also sharpened the central safety lesson, documented in published poisoning case reports: tea tree oil is for external use only and is dangerous — even in small amounts — if swallowed, a caution covered fully on the main Tea Tree page. The detailed chemistry, clinical evidence, dosing, and safety are taken up in the Tea Tree hub and the Tea Tree Benefits articles. The thread from a Bundjalung healing lagoon, through a 1925 museum laboratory, to a modern ISO standard and a Cochrane-style review is short, but for a single-region swamp tree it is a remarkably continuous one.

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Research Papers and References

The references below combine the key historical and peer-reviewed sources used on this page with curated PubMed topic-search links. Author names, titles, and journals are given as plain text; only stable identifiers (DOI, PMID, or archival links) are hyperlinked, and each opens in a new tab. Where the historical record rests on oral tradition or on widely repeated trade and popular accounts rather than on a single primary citation — as with the “thousands of years” of Bundjalung use and the Second World War service details — that is stated in the text above rather than dressed up as a precise citation.

  1. Penfold AR, Grant R. The germicidal values of some Australian essential oils and their pure constituents, together with those for some essential oil isolates and synthetics. Part III. Journal and Proceedings of the Royal Society of New South Wales. 1925;59:346–350. — doi:10.5962/p.359906 (Biodiversity Heritage Library)
  2. Carson CF, Hammer KA, Riley TV. Melaleuca alternifolia (tea tree) oil: a review of antimicrobial and other medicinal properties. Clinical Microbiology Reviews. 2006;19(1):50–62. — doi:10.1128/CMR.19.1.50-62.2006; PMID 16418522
  3. Bugarcic A, Bowles EJ, Summer K, Agnew T, Barkla BJ, Lauche R. Australian tea tree (Melaleuca alternifolia) oil: an updated review of antimicrobial and other medicinal properties. Phytomedicine Plus. 2025;5(3):100846. — doi:10.1016/j.phyplu.2025.100846
  4. Kairey L, Agnew T, Bowles EJ, Barkla BJ, Wardle J, Lauche R. Efficacy and safety of Melaleuca alternifolia (tea tree) oil for human health — a systematic review of randomized controlled trials. Frontiers in Pharmacology. 2023;14:1116077. — doi:10.3389/fphar.2023.1116077; PMID 37033604
  5. Bassett IB, Pannowitz DL, Barnetson RS. A comparative study of tea-tree oil versus benzoylperoxide in the treatment of acne. Medical Journal of Australia. 1990;153(8):455–458. — doi:10.5694/j.1326-5377.1990.tb126150.x; PMID 2145499
  6. Del Beccaro MA. Melaleuca oil poisoning in a 17-month-old. Veterinary and Human Toxicology. 1995;37(6):557–558. — PMID 8588296 (documents the external-use-only safety caution)
  7. Melaleuca alternifolia — traditional and ethnobotanical use (PubMed topic search) — PubMed: tea tree traditional use
  8. Tea tree oil — history and antimicrobial properties (PubMed topic search) — PubMed: tea tree oil history and antimicrobial

External Authoritative Resources

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Connections

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