Where an oil comes from, why that place and not another — and why the arrangement with the people who grow it decides what ends up in the bottle.
~14 min read
Turn a bottle of lavender over and find the botanical name: Lavandula angustifolia. That name is doing less work than you think. The same species, planted in two places, gives two different oils — different in the numbers a laboratory prints at the end of a batch test. Same seed, same still, different ground, different oil.
A plant is not a factory running to a recipe. It builds its aromatic compounds in response to the conditions it stands in. Altitude, soil minerals, drainage, rainfall, the gap between day and night temperature, how hard the light is, how much the plant has had to defend itself — all of it moves the balance. Plants and oils covers what these compounds are for. This lesson is about what changes when you move the plant.
Lavender is listed at 25–45% linalyl acetate and 20–47% linalool. Those are not sloppy figures or a margin of error — they are the honest spread across real harvests. A lot near the top of the ester range and one near the bottom are both genuine, unadulterated lavender, and they will not smell the same or test the same.
Every oil in the library carries an origin, and a few read together teach you how to read the field:
Frankincense
Somalia, Oman, Ethiopia, India — four countries, and four different Boswellia species sold under one English word.
Bergamot
Reggio di Calabria, Italy — effectively one province on one coastline.
Vetiver
India and Sri Lanka, where the grass is native, alongside Haiti, which became the centre of the trade.
Lavender
Mediterranean. Botanically true, and not where most of the world’s lavender oil is grown.
An origin sometimes means the plant’s botanical home, sometimes where the crop is now farmed, often both. Bergamot is both. Lavender is not — the Mediterranean is where the species belongs, while the largest producing region today is Bulgaria. Reading origin as one fact is the mistake. It is two stacked: where a plant is from, and where it is grown well.
So “lavender” is not one thing, and neither is any other name on your shelf. It is a species plus a place plus a season plus a week of harvest plus a run in a still. What an oil is covers the first; distillation the last. Sourcing is everything in between.
A plant shaped by a particular set of conditions does its best chemistry when put back into them — and those conditions usually look hostile written down. Thin soil. A long dry season. Cold nights. Ground too steep to plough. A plant working hard makes more of the compounds we distil, because those compounds are how it copes.
| Oil | Where it is grown | Why that place suits it |
|---|---|---|
| Frankincense | The Horn of Africa — Somaliland, Somalia, Ethiopia, and Dhofar in Oman | Boswellia grows on shallow limestone and steep rock where little else bothers. A tree living that hard invests heavily in wound-sealing resin, which is the entire crop. |
| Lavender | The Kazanlak valley in Bulgaria, and Haute-Provence in France | High, stony, well drained, hot days and cold nights. The Haute-Provence appellation requires cultivation above 800 metres; growers hold that height lifts the ester fraction and holds camphor down. |
| Tea Tree | The coastal floodplains of northern New South Wales | Native to a narrow humid, seasonally flooded band. It regrows fast from a cut stump, so a plantation is coppiced rather than replanted. |
| Vetiver | Haiti | A grass whose crop is underground: heat, a long dry finish to concentrate the root, hillsides too steep for machinery. Every root is lifted by hand. |
| Ylang Ylang | Madagascar and the Comoros | Constant warmth and wet lowland let the tree flower all year rather than in one season. Flowers are picked before dawn and distilled the same morning; a delay of hours changes the oil. |
| Wild Orange | Brazil | A subtropical plateau with cool nights and a dry finish that concentrates the peel. Cold-expressed, so produced where the fruit is already juiced at scale. |
Not one of those reasons is about the country. They are about altitude, drainage, day length, rainfall and terrain, which is why a growing region is usually far smaller than the nation it sits in — a valley, a coastal strip, one escarpment. You can grow the plant almost anywhere. You cannot grow the same oil.
Diagram to come
A single world map, flat and unfussy, in the cream and green register — no political borders drawn heavily, land in parchment, water in pale stone. Mark the curriculum’s main growing regions as small solid dots with a leader line to a label, sized so the map still reads on a phone. Do not scatter the whole oil library across it; show only the regions named here. Each label carries the oil name and the place on two lines. Cluster the Horn of Africa dots (Somaliland, Oman, Ethiopia) so they read as one sourcing region rather than three separate claims. The reader should be able to tell at a glance that the regions sit in narrow bands rather than spread evenly over the map, and that several of them fall inside the tropics.
Of everything a grower controls, timing is the one they argue about most — and the one variable a buyer can never see in the finished bottle. The same field gives a different oil at dawn than at two in the afternoon, and a different oil again in the second week of flowering than in the fourth.
The hour is the simpler half. Volatile compounds are volatile: on a hot, still afternoon a proportion of the lightest is lost from the standing crop and from cut material lying in a trailer. So ylang ylang flowers are picked before dawn and are in the still the same morning; lavender is cut after the dew has gone and before the day’s heat. A field cut at the wrong hour is not ruined — it is a few per cent lighter in exactly the fraction that gives the oil its top note.
The week is the harder half, because what shifts is not how much oil there is but what it is made of. As a plant moves from bud to full flower to seed set, individual compounds convert into others. Cut early and you get one profile. Wait a fortnight and you get another, from the same plants.
Aromatic compounds are not stored inert. They sit inside living tissue where enzymes are still working, and many of them are intermediates in a pathway rather than end points. A compound made early in the season is a starting material for something the plant wants later.
Lavender is the clearest case. Its two leading constituents, linalyl acetate and linalool, are one step apart: the ester is the alcohol with an acetate group attached. As the flower ages — and after it is cut, and in a hot still — that bond is progressively broken, and the ester fraction falls while the alcohol fraction rises. This is most of why the library quotes such wide ranges, and why a buyer watches the ratio between the two rather than either number alone. A high ester share relative to alcohol is the signature of a lot cut at the right moment and distilled gently. Lavender goes into what each of the two does to the oil’s character.
Peppermint runs the same story in the opposite direction. The library lists it at 30–50% menthol and 15–30% menthone, and in the growing plant menthone is largely a precursor: through the season it is reduced to menthol, so a young crop is menthone-heavy and sharp while a mature one is menthol-led and rounder. Mint growers work to a narrow window for that reason.
Be straight about what is settled here. The direction of both conversions is well described in published constituent analyses. The optimum week is not a universal number — it moves with latitude, altitude, cultivar and the weather that season, which is why it is held as local knowledge by people who have cut the same field for thirty years rather than written on a calendar. That knowledge is one of the things a sourcing relationship is actually buying.
The variable you are trusting someone else with
You can test a finished oil for what is in it. You cannot test it for what it would have been if it had been cut nine days later. Harvest timing is the largest quality decision in the chain, it is made by one person standing in a field, and no laboratory report will tell you whether they got it right.
Co-Impact Sourcing is doTERRA’s name for how it buys. Stripped of the usual language, it is four structural commitments. Read them as structure, not sentiment.
Grow it where it belongs
Source each plant from its native region rather than from wherever land and labour are cheapest that year. The network now spans over 45 countries.
Pay the grower directly
Buy from the farming and harvesting communities themselves rather than through layers of brokers, with the price agreed ahead of the season rather than settled at the gate, and paid on time.
Agree for years, not for loads
Long-term agreements with the same communities and regions, instead of buying on the spot market wherever a batch is cheapest this quarter.
Invest beyond the crop
The doTERRA Healing Hands Foundation works alongside the sourcing network, funding clean water, health care access, education and micro-credit programmes in the communities the oils come from. doTERRA states that it covers the foundation’s operating costs so that donations go to the projects themselves.
The honest version is more convincing than the promotional one: this is a supply strategy as much as an ethical position. A company selling one oil at a consistent specification needs the same region every year, a harvest cut in the right week rather than early for cash flow, enough volume in a bad season, and the crop still existing in twenty years. All four are met by paying directly, agreeing prices in advance and signing for years. The ethical arrangement and the reliable one are the same arrangement — a sturdier argument than altruism, because it does not depend on goodwill holding.
Photograph to come
A grower or distiller at work at an on-site still in a sourcing region — hands, plant material, the equipment actually used, in real working light. Not a portrait and not a posed handshake. The subject is the work and the proximity of the still to the field; the reader should register that the person operating it is the same person who decided when to cut. Fits the existing lifestyle/ photography register: warm, documentary, unstyled.
It is tempting to file sourcing ethics in one drawer and oil quality in another. They are the same drawer: the arrangement between buyer and grower is upstream of every number on a batch report.
Follow through the decision that matters most. A grower paid on delivery, at whatever the price is that week, by a buyer who may not return next year, has every reason to cut when the cash is needed and to cut everything. A grower with an agreed price, a contract for several seasons and payment arriving on a known date can afford to stand in the field and wait nine more days for the ester fraction to be right. Same field, same plants, two different oils — and the difference was decided by the contract, not the still.
The same logic runs through everything after the cut. Distilling properly costs time, and time is fuel and labour: a still run long and low gives a more complete oil than one pushed hot and fast to get the next load in, which is the trade-off in Distillation. Nobody runs the patient version under margin pressure. Sorting resin by grade, washing vetiver root, picking ylang ylang before dawn — all of it is work someone has to be able to afford to do.
Every intermediary between the field and the bottle is also a point where the material can be diluted, substituted or blended with something cheaper. A short chain is not only an ethical preference. It is fewer hands, fewer opportunities, and a shorter list of people to trust.
None of this is a claim about what an oil then does. It is a claim about what is in it. The ratio of constituents in your bottle is the result of a hundred small decisions, most of them economic before they were botanical. The oil effect is why those ratios, rather than any single compound, are what an oil actually is.
A farmed crop can be planted again. A wild one cannot, or not on any timescale that helps. Several of the most valued aromatics are gathered from trees nobody planted, and demand has risen faster than the trees can grow. This is the part of sourcing that does not make a good advertisement, and a healer should know it.
Frankincense
Boswellia is tapped by cutting the bark, and a tree tapped too often or too deeply produces less viable seed. Hard-harvested groves stop regenerating — mature trees still standing, almost no young ones behind them. Several Boswellia populations are assessed as declining.
Sandalwood
The oil is in the heartwood, so the tree is felled rather than harvested from. Indian sandalwood was cut so heavily that the state took control of standing trees, and wild stocks have not recovered. Most legitimate sandalwood oil now comes from plantations planted decades before cutting.
Rosewood
Brazilian rosewood was distilled from the felled trunk for its linalool, at a rate the forest could not carry. It is listed under CITES.
Agarwood
Formed only when a wild Aquilaria tree is infected and responds by laying down dark resin, so most trees cut yield nothing. Among the most valuable raw materials on earth by weight, listed under CITES, and heavily poached.
What links those four is that harvesting the oil and harvesting the tree are not the same act. Lavender is mown and grows back; tea tree regrows from the stump. A sandalwood tree is the crop, and once it is gone the next is thirty years away.
Sustainable wild harvesting is harder than farming. On a farm the person who plants owns what grows and carries the loss if they take too much. On a wild harvest the tree may stand on common ground, several families may cut it, and anyone who shows restraint simply leaves the resin for whoever comes next. Restraint has to be worth something, or it will not happen.
Every one of those is a sourcing arrangement rather than a botanical technique, which is the point of this section. Frankincense follows the tapping itself — the depth of the cut, the flows across a season, why the later flows are cleaner.
Video to come
A doTERRA sourcing film shot in a wild-harvest region — frankincense in Somaliland or vetiver in Haiti — showing the harvest itself, the terrain, and the people who hold the harvesting rights. Prefer one that shows the work rather than one built around interviews about the programme. If a choice exists, use the film that shows a grove and its young trees, because regeneration is the thing this section is asking the reader to look for.
Most of this lesson describes things you take on trust. Four are visible from where you stand.
The species
A botanical name on the label, in full. Lavandula angustifolia is not Lavandula x intermedia. Boswellia frereana is not Boswellia papyrifera. A bottle naming only an English word has told you nothing, and at the price some of these oils command, that silence is where adulteration lives.
The origin
Whether the company will tell you where an oil is grown, by region and not by continent. “Sourced globally” is not a claim — nothing in it could turn out to be false. “Lavender from the Kazanlak valley” is a claim, and a checkable one.
The batch
A lot number on the bottle that resolves to a report for that specific lot, not a specimen report for the product in general. doTERRA publishes these at sourcetoyou.com, where an oil can be traced by lot number from the farm to the bottle in your hand.
The numbers against the range
A batch report gives the actual constituent percentages for your bottle. Compare them with the published range for the species — lavender’s 25–45% linalyl acetate, peppermint’s 30–50% menthol. A figure outside the range is not automatically wrong, but it is a question worth asking.
The principle underneath all four: prefer the specific claim to the warm one. A company that names its growing regions has made a statement that could be checked and could be wrong, which is what makes it worth something. Vagueness is not dishonesty, but it is unfalsifiable, and unfalsifiable claims are free to make.
Reading a batch report is its own subject, covered in Purity and quality along with what each test can and cannot detect. Every oil’s page in the library carries its origin, botanical name and constituent ranges — the comparison above in two taps. Which oils are available to you differs by country; the product range is not the same in all 65 markets.
Keep oils away from eyes and inner ears, and out of reach of children. If you are pregnant, nursing, under medical care or taking medication, speak to your healthcare practitioner before use. Nothing here is intended to diagnose, treat, cure or prevent any disease.
Lesson 4 of 21 · Essential Oils