Two fruits, two eras

We often believe that the clementine and Corsica have a thousand-year history. That is false, and the truth is more interesting.

The island's historic citrus fruit, the one that shaped its landscapes and its wealth, is the citron. It has been there since the Romans. As for the clementine, it arrived in 1925 and only became an industry after 1960.

Between the two, there was a collapse, a war, decolonization, and a development plan. The history of Corsican citrus is that of an island that lost one fruit and found another.

A century separates the world's leading producer of citrons from France's only producer of clementines. It is the same plain.

The citron, the citrus that made Corsica

It was the Romans, in the first century, who brought the knowledge of citrus cultivation to Corsica. And what they planted there was neither the orange nor the lemon: it was the citron.

This enormous, bumpy fruit, almost without juice and made mostly of peel, changed the island's landscape. Orchards were established on the eastern coast, and later in the Cap Corse. The Corsican citron was sold throughout Europe, primarily for confectionery.

At the end of the nineteenth century, an event tipped the market: diseases ravaged Italian crops. Corsica then became the world's leading producer of citron. An island of a few hundred thousand inhabitants, leading an international market.

This prosperity would not survive the twentieth century. Demand changed, industrial confectionery found cheaper options elsewhere, and men went off to war and then left the countryside. The citron trees remained, but the industry disappeared.

Today, the Corsican citron still exists, in small quantities, in jam and liqueur. It has become what the clementine is not: rare, difficult, and almost confidential.

The orange tree arrived in the twelfth century. Then the lemon tree, the mandarin tree, and finally the clementine tree.

The clementine is not an ancient fruit

The clementine itself has only existed since 1892. It was born in Algeria, from a cross between a mandarin tree and an orange tree created by Brother Clément, who gave it his name.

The first French clementine trees were planted in Corsica in 1925, by Don Philippe Semidei, in Figaretto. For several decades, cultivation was limited to two or three orchards. Nothing more.

Everything changed starting in 1957. Corsica was provided with a regional action plan intended to curb the depopulation of its rural areas. A mixed-economy company, SOMIVAC, was tasked with developing the eastern plain, creating agricultural plots, and building hydraulic equipment. The stated ambition was to make Corsica a "French California."

In 1959, a citrus research station was inaugurated in San-Giuliano, north of Ghisonaccia. It would be handed over to the INRA in 1965. It was the one that provided the plants, the grafts, and technical advice to the entire island.

The final factor was human. Between 1962 and 1964, the massive arrival of repatriates from North Africa brought farmers who already knew about citrus. They brought the technique and the means. An island agricultural historian wrote it bluntly: without them, the island's citrus industry would not have started.

The numbers show the speed of the shift:

• 250 tons produced in 1965.
• 25,000 tons ten years later, in 1975.

In a decade, the eastern plain went from livestock farming to citrus monoculture.

What the PGI really mandates

The "Clémentine de Corse" Protected Geographical Indication (PGI) was registered in 2007, after an administrative battle lasting several years. The application had been rejected by the European Commission in 2005.

The choice of PGI rather than AOC (Appellation d'Origine Contrôlée) is not trivial: an appellation of origin requires an ancient link to the territory, which the clementine, having arrived in 1925, could not claim.

Three conditions, and they are more demanding than one might think:

• Must come from Corsican crops, in one of the 106 municipalities of the area, 38 in Southern Corsica and 68 in Upper Corsica.
• Must be hand-picked, at maturity, with its leaves. No mechanical harvesting, no fruit picked green.
• Must not have undergone any coloring treatment. This is the decisive point, and we will come back to it right after.

The story of the leaf

The leaf is not a marketing argument; it is a regulatory remnant. For a long time, Corsica was the only zone authorized to sell its fruit with its leaves, because its island status rendered it free of certain plant viruses. This exclusivity was lost in 1993, when European phytosanitary regulations were changed.

It has remained as a sign. A green and supple leaf means a fruit picked recently, by hand, and one that hasn't lingered.

Why it tastes the way it does

The Corsican clementine is smaller, tarter, and more colorful than its Spanish or Moroccan competitors. It is not a question of variety; it is a question of climate.

Color

It comes from carotenoids, the development of which depends on the temperature difference between day and night. This difference is much more marked in Corsica than elsewhere, which gives the fruit its characteristic orange-red hue.

Size

Island temperatures are cooler than in other producing countries. The fruit grows less.

Acidity

The relative lack of heat prevents a high accumulation of sugar. Hence this livelier, sharper taste, which some find too acidic and others cannot do without.

There is an irony in all of this. In the nineties, faced with Spanish competition, producers planted larger and more productive foreign varieties. The failure was clear. And when the INRA conducted a study on what buyers on the continent really appreciated, the answer came back: it was the Corsican variety, with its supposed flaws. These flaws were the product.

The harvest calendar

The season runs from October to January, in three waves according to the varieties:

• Early varieties, including the Caffin, open the season in October.
• Seasonal varieties, such as Commune SRA and Oraval, occupy the heart of the harvest in November and December.
• Late varieties, like the Nules, close the season until January.

The orchards are located on the eastern plain, from Bastia to Porto-Vecchio, generally between 2 and 300 meters above sea level, and rarely more than fifteen kilometers from the coast. This proximity to the sea is no coincidence: it pushes back the first frosts at the end of December.

The state of the industry today

The Corsican clementine remains a modest, family-run agriculture. Approximately 215 producers farm some 1,721 hectares. On a Spanish scale, this corresponds to a medium-sized cooperative.

Volumes vary significantly from one year to the next, and the climate is the main cause:

• 48,600 tons harvested in 2024.
• Approximately 36,000 tons estimated in 2025, nearly a quarter less.

These gaps are not new. In 1999, a storm caused half the fruit on the trees to fall. An island industry, on an island where the wind causes as much damage as the frost, never knows a quiet year.

How to recognize a true Corsican clementine

This is the most useful question, and there are reliable signs.

• The leaf. Green, supple, still attached. It is the first clue, and the most visible.
• Irregular color. A Corsican clementine may have greener or lighter areas. This is normal, and it is even a good sign: it has not undergone any coloring treatment. A uniformly bright orange fruit has often been "degreened."
• Size. Rather small. A very large clementine without a leaf in December is unlikely to come from the island.
• The PGI logo and the mention "Clémentine de Corse" on the packaging. It is the only legally protected sign.
• Taste. Tart, frank, with real tension. If it is sugary, it isn't the real thing.

One final marker: the season. Outside the October-January window, a clementine does not come from Corsica.

Frequently asked questions

When is the Corsican clementine season?

From October to January, depending on the variety. The early ones arrive in October, the late ones are harvested until January. Outside this period, the fruit comes from elsewhere.

Why does the Corsican clementine have leaves?

Because the PGI specifications require it: the picking must be manual and the fruit sold with its leaves. It is proof of freshness and traceability. Historically, Corsica was in fact the only zone authorized to do so, until 1993.

Why is it sometimes green?

Because it is not treated to be artificially colored. Uniformly bright orange clementines have often undergone degreening. An irregular shade is a guarantee of naturalness, not a flaw.

Does Corsica really produce all French clementines?

Almost. Corsica accounts for 98% of French production and is the only territory in the country to cultivate this fruit on an industrial scale.

Does the Corsican citron still exist?

Yes, but in very reduced quantities. After being the world's leading producer at the end of the nineteenth century, Corsica only cultivates it on a small scale, mainly for jam and liqueur.

Clementine or mandarin, what's the difference?

The clementine is a hybrid of the mandarin tree and the orange tree, created in 1892. It contains few or no seeds, and its skin peels more easily. The mandarin is the original species, more fragrant but richer in seeds.

Why this subject matters to us

At TAFANELLI, we design what makes up the island's memory. Citrus fruits hold a strange place there, and that is precisely what interests us.

Because this history says something uncomfortable and true. The clementine, today one of Corsica's strongest agricultural symbols, is not Corsican in origin. It was born in Algeria, it was planted by a man in 1925, and it became an industry thanks to repatriates who had lost everything elsewhere.

In other words: what constitutes the identity of a territory today often began with an arrival.

We like this idea, because it contradicts the lazy version of identity, the one that would have an island be a closed museum. Corsica has never been that. It took the citron from the Romans, the orange tree in the Middle Ages, the clementine in the twentieth century, and it made something of them that no one else knows how to do.

There is one last thing that speaks to us. In the nineties, they wanted to correct this fruit, make it bigger, sweeter, more conformist. It didn't work. What people loved were exactly the characteristics we were trying to erase.

We draw the same lesson for what we make. What makes something desirable is rarely what makes it conformist.

Also read, in the same family: Corsican charcuterie, Corsican cheeses, chestnuts and the Castagniccia, and Corsican wines.

When passing through Corsica, the customer becomes a friend.

A DOPU, TAFA