Madagascar · vani, đinh hương, ngọc lan tây

A green vanilla pod, as long as a hand, with no smell of vanilla. A dried clove bud, brown, shaped like a small nail. A yellow ylang ylang flower, its petals long and soft as ribbon. All three come from the eastern and northern coasts of Madagascar, a large island in the Indian Ocean.

An island in the Indian Ocean

Rain decides the scent map of Madagascar. Most aromatic crops grow along the eastern and northern coasts, where rain falls through the year. Vanilla is concentrated in the Sava region in the northeast. Clove is in Analanjirofo. Ylang ylang is on the island of Nosy Be and in the Ambanja area facing it. The central highlands give ravintsara, a chemotype of the camphor tree rich in 1,8-cineole.

According to FAO figures for 2018 to 2023, Madagascar produced about 42 percent of the world's vanilla. The island is also the largest source of clove leaf oil, and clove is its second agricultural export after vanilla. The name Bourbon on vanilla labels is shared by Madagascar, Réunion and the Comoros, after the old name of Réunion.

A common feature of many sources on the island is small family farms and distillation in wood fired stills on site. That affects the forest, the price and the consistency from one lot to the next. In the early twentieth century, raw material houses from Grasse opened plants in Madagascar and the Comoros; that route is told in Grasse · A Town That Grows Flowers for Bottles.

The vanilla orchid and hand pollination

Vanilla is an orchid. Vanilla planifolia is a climbing orchid from Mexico that clings to a host tree and bears clusters of greenish yellow flowers. In Mexico a native bee pollinates it. In Madagascar there is none. Without that bee, the flower opens and falls without setting fruit.

The answer came from neighbouring Réunion. In 1841, a twelve year old boy named Edmond Albius found a quick way to pollinate the flower with a thin stick and a movement of the thumb: lift the membrane that separates the two parts of the flower, then press the pollen onto the stigma. The method is still used today, since nearly all the world's vanilla is pollinated by hand.

Each flower opens for a single day and must be pollinated that day. One flower gives one pod. About 80 percent of Madagascar's vanilla comes from Sava, mostly from small family farms, where walking every vine each day of the flowering season is work for the whole household. The price of a kilogram of vanilla therefore holds thousands of small movements of the fingers.

Curing the pods: vanillin forms

A green vanilla pod has almost no smell. Inside the tissue, the aromatic molecule is still bound to a sugar, as glucovanillin. The smell only forms through a curing process lasting several months: the pods are blanched in hot water, sealed to sweat, sun dried and then dried slowly. During those months, the pod's own enzymes split off the sugar and vanillin is released.

Vanillin is a small molecule, formula C8H8O3, sweet, warm, creamy and slightly powdery. It is the main single aromatic compound in pods after curing, but not the whole vanilla smell. Natural vanilla smell comes from hundreds of other compounds together, such as 4-hydroxybenzaldehyde, anisaldehyde and aromatic acids in very small amounts. Vanilla has no distilled oil; it is used as a tincture, a solvent extract or a CO2 extract.

Synthetic vanillin, or vanillin made from eugenol or lignin, is many times cheaper than natural vanilla. The nose cannot tell the origin apart; carbon isotope analysis can. This is one reason the price of natural vanilla swings so widely: it competes with an identical molecule made much faster.

Price also depends on weather, theft and policy. The opening date of the green pod harvest is set by the government each year to limit early picking and theft; the 2024 to 2025 season in Sava opened at the end of June. In May 2023 Madagascar abolished its export floor price of 250 USD per kilogram. Prices then fell sharply, some grades below 20 USD per kilogram, and in June 2026 the government set a new, lower farm gate floor price.

Clove on the east coast

A clove is a flower bud picked before it opens and dried. The tree, Syzygium aromaticum, is native to the Maluku Islands of Indonesia and grows along Madagascar's east coast, concentrated in Analanjirofo, a Malagasy name meaning the forest of cloves. About 90 percent of production lies in three districts, Mananara, Soanierana Ivongo and Fénérive Est, over about 80,000 hectares, the main income of some 30,000 farming households.

Madagascar ranks second in clove bud production after Indonesia, but exports more, because Indonesia uses most of its crop for domestic kretek cigarettes. Buds are picked roughly from October to March. Outside the bud season, farmers cut leaves and gather fallen twigs to distil leaf oil. Madagascan leaf oil holds more than 80 percent eugenol, and much of it is refined further into natural eugenol above 99 percent, the feedstock for the very natural vanillin made from eugenol.

The three clove oils, from bud, stem and leaf, differ in eugenyl acetate and caryophyllene; the label should name the part distilled. Clove bud oil is the most expensive and the finest in smell of the three, with eugenol at roughly 73 to 97 percent. That eugenol content sets the maximum skin level for bud oil at 0.5 percent.

Leaf oil stills in the countryside burn firewood. A 2024 study in Forest Policy and Economics argued that the clove sector needs further measures so as not to contribute to forest loss. Some programmes are planting fuelwood trees and testing fuel efficient stills in Analanjirofo.

Ylang ylang from Nosy Be and the Comoros

Ylang ylang flowers are distilled on the day they are picked. Cananga odorata, form genuina, is grown on Nosy Be and around Ambanja, but the largest source remains the neighbouring Comoros, especially the island of Anjouan. In 1885 Léon Humblot received a concession on Grande Comore and set up plantations of spices and aromatic plants; from the 1960s and 1970s, as the land was redistributed, Comorian farmers began distilling on their own.

According to a 2023 value chain study by Pierre William Johnson, the Comoros produce 40 to 70 tonnes of oil a year, out of a world total of about 100 tonnes. On Anjouan, some five to six thousand women work as flower pickers. Each tree gives about one kilogram of flowers per picking; a still takes 100 to 200 kilograms. Traditional wood fired stills reach only 15 to 25 percent energy efficiency, and Anjouan has lost about 70 percent of its natural forest.

Ylang ylang is one of the few essential oils sold by fractions of a single distillation. The first oil to come over, called Extra, is rich in esters and p-cresyl methyl ether, with a dense, sweet floral smell. Then come grades I, II and III, each heavier and richer in sesquiterpenes; complete oil is the whole run undivided. The standard ISO 3063 separates the grades mainly by density. The story of those cuts is told in Ylang Ylang · Five Cuts of One Distillation.

Harvest seasons on the island

Each material on the island keeps its own rhythm. Vanilla's green pod season opens at the end of June or in July by yearly decree, followed by months of curing before the pods smell of anything. Clove buds are picked from October to March. Clove leaves are cut through the year, more so outside the bud season. Ylang ylang flowers year round in flushes. Ravintsara in the highlands is distilled year round.

The highlands also offer a lesson in names. Ravintsara is the Malagasy name for the camphor tree, Cinnamomum camphora, grown on the island; its leaf oil is rich in 1,8-cineole, usually more than half, with almost no camphor. Ravensara is a different native species in the laurel family, whose oils show high estragole or methyleugenol in some samples. The two similar names were confused on the market for years, so the Latin name and the chemotype matter more than the trade name.

That rhythm explains why two lots with the same name can differ. A lot of vanilla depends on the opening date, the ripeness at picking and each household's curing. A lot of ylang ylang depends on the hour of picking, the time from garden to still, and the point where the run is cut. A lot of clove leaf oil depends on the ratio of leaves to twigs in the still. The Madagascar page in the library records the regions, seasons and figures for each.

A flower needs a finger.

A pod needs months.

The smell of vanilla is time measured in labour.