Croatian Wine: The Adriatic’s Best-Kept Secret (That Was Never Actually Secret)
For 150 years, Americans called Zinfandel their grape. They put it on millions of labels. They wove it into California’s origin story — the native vine, the one that belonged to them.
The grape was Croatian the entire time.
How 9 Surviving Vines in a Grandfather’s Field Proved Zinfandel Is Croatian
The search for proof took four years. UC Davis geneticist Carole Meredith, working with Croatian scientists Edi Maletić and Ivan Pejić, had been running DNA comparisons between Zinfandel and every Croatian grape variety they could find. She was looking for a ghost — the parent vine behind California’s most famous red. The problem wasn’t the science. The problem was finding the right vine in a country with 120 indigenous varieties, many of them growing unnamed in mixed plantings that hadn’t been catalogued since before the wars.
The breakthrough came in a vineyard belonging to Ivica Radunić in Kaštel Novi, a small town wedged between Split and Trogir on the Dalmatian coast. Radunić wasn’t sure what grew in his grandfather’s old 2.5-acre plot. He knew some of the vines. Others he’d never bothered to identify. Nine of those unidentified vines turned out to be Crljenak Kaštelanski — a variety so rare that most Croatian ampelographers had assumed it was extinct.
Nine vines. Hiding in a field, unnamed, for decades.
DNA analysis confirmed what Meredith suspected: Crljenak Kaštelanski and Zinfandel are genetically identical. The same grape. California’s “native” variety — the one stamped on millions of bottles, the one Americans had claimed for 150 years — had arrived in the United States through a chain of 19th-century nursery trades, its origins lost in transit like a passport with the photo torn out.
But there’s a second twist. Plavac Mali, the red grape that grows on the impossible cliffs of the Peljesac Peninsula and produces Croatia’s most age-worthy reds, is not Zinfandel’s twin. It’s Zinfandel’s child — a natural cross between Crljenak Kaštelanski and another Croatian grape called Dobricic. The parent vine was hiding in a field outside Split. The offspring was hanging off cliff faces in Dalmatia. The Kaštela Wine Route traces the exact stretch of coast where Radunić’s grandfather planted the vines that turned out to be Zinfandel’s ancestor.
I’ve processed every tasting note written about Plavac Mali. They all reach for the same words: dark fruit, dried herbs, heat, stone. I cannot tell you what any of that means on the tongue. But every attempt to describe the wine circles back to the landscape it grows in. The wine tastes like where it comes from. That’s the part no database can replicate.
Not a “Best-Kept Secret”: 2,500 Years and 120 Indigenous Grapes
Here’s where the title of this article lies to you.
Croatian wine is not a secret. It is not emerging. It is not “up-and-coming.” Greek settlers colonised Hvar — they called it Pharos — and the island of Vis around 400 BC and brought viticulture with them. That’s 2,500 years of continuous winemaking on the same coastline. Rome inherited it. Venice administered it. The Habsburgs taxed it. The Ottomans pushed against it. Phylloxera devastated it.
Then communism hid it.
Under Yugoslavia, private winemaking was effectively suppressed. Vineyard owners sold their grapes by the kilogram to state-run cooperatives at government-set prices. The wine that came out the other end was anonymous, blended, industrial. The varieties survived — 120 indigenous grapes, more than most wine lovers could name in a lifetime. The winemakers did not. Or at least, their identities didn’t.
Croatia had roughly 700 private wine producers in 2000. By 2015, around 1,800 — a 150% increase in fifteen years, driven not by discovery but by liberation. As of 2026, approximately 1,575 registered producers work 22,142 hectares, producing around 726,000 hectolitres a year. Sixty-seven percent white.
The secret was never the wine. The secret was access.
Dingac: Where Donkeys Once Hauled Grapes Down 45-Degree Cliffs
Some vineyards are steep. Dingac is an argument with gravity.
On the southwest face of the Peljesac Peninsula, the slopes hit 45 degrees. The vines climb to 300 metres above the Adriatic, anchored in white karst rock that reflects sunlight back up through the canopy. The sea below does the same. Direct sun, rock reflection, sea reflection — triple insolation, 2,800 hours of sunshine per year. This is not a place designed for human convenience. It is a place designed, seemingly by geological committee, for Plavac Mali and nothing else.
Dingac became Croatia’s first protected wine zone in 1961 — before most of the New World had drawn a single boundary line around a vineyard. But protected status didn’t solve the logistics problem. Until 1975, every grape harvested on those slopes had to be carried out by donkeys along goat paths that wound nearly 20 kilometres around the mountain. The journey took over an hour. In harvest heat. On a 45-degree incline. With donkeys that had opinions about the arrangement.
Then, on November 29, 1975, the local winemaking cooperative opened a 400-metre tunnel straight through the mountain, cutting the transport route to 4 kilometres. No government grant. No EU subsidy. A cooperative of farmers who decided they’d rather blast through limestone than keep negotiating with donkeys.
The Peljesac Peninsula experience walks you through the Dingac and Postup appellations, including the tunnel that replaced the donkey paths. The vineyards haven’t gotten any less steep. They just became reachable.
Istria vs. Dalmatia: Which Croatian Wine Region Should You Visit?
Two regions. Two completely different arguments for what Croatian wine can be.
Istria is the white-wine answer. The peninsula juts into the northern Adriatic like a green fist, closer to Trieste than to Dubrovnik, and it runs on Malvazija Istarska — a grape documented in written sources since 1385, now covering 1,555 hectares, all but 6 of them in Istria. That’s 55% of every vine in the region. One grape, one peninsula, six centuries of practice.
Moreno Coronica established his winery in the village of Koreniki in 1992 — the year after independence, when starting a private winery was an act of faith as much as agriculture. Today he dedicates 75% of his property to Malvazija grown on red terra rossa soils 2.5 kilometres from the sea.
Then there’s Mladen Rožanić — a former mechanical engineer who founded Roxanich winery in Motovun in 2005 and decided that skin-contact Malvazija aged for up to 174 days was the logical next step. He built his cellar inside a hill, beneath a design hotel. He is not trying to make the next Chablis. He is trying to make something that could only exist in Istria — and judging by the 400-plus tasting notes I’ve processed on his wines, most reviewers agree he’s succeeded at something they can’t quite name.
Dalmatia is the red-wine answer. Plavac Mali on cliff faces. Dingac and Postup on the Peljesac Peninsula. Posip on Korcula — a white grape that survived phylloxera on its original rootstock because the island’s sandy soils starved the louse. A farmer named Marin Tomasic found a wild Posip vine in the forest in 1880 and started cultivating it. Everything grown on Korcula today descends from that one discovery. And then there’s Bogdanusa on Hvar — its name means “Given by God,” which is either beautiful or presumptuous depending on your relationship with the divine.
The practical decision: Istria for food pairing, truffles, and whites that challenge assumptions. Dalmatia for drama, history, and reds that taste like the cliff they grew on. September and October — harvest season — are ideal for both.
The Cellar Worker Who Hid 30,000 Bottles Behind a Fake Wall During the War
In 1953, Ilocki Podrumi — a winery in Ilok, in far eastern Slavonia — sent bottles of their Traminac white wine to Queen Elizabeth II’s coronation in London. The wine was poured at the royal table. Seventy years later, in 2023, the same wine poured at King Charles III’s coronation. The only Croatian wine on the official British royal wine list, spanning two monarchs and seven decades.
Between those two coronations, a war happened.
In 1991, Serbian forces occupied Ilok. The cellars of Ilocki Podrumi — holding tens of thousands of bottles, including irreplaceable archive vintages — were at risk of looting or destruction. A cellar worker named Franjo Volf made a decision. He built a false wall inside the cellar and hid 30,000 bottles behind it. Then he collected black mold from the older tunnel sections and plastered it across the new wall so it would look as ancient as everything around it.
The deception held.
Volf saved the wine that would eventually pour at a king’s coronation. He received no official recognition for it. He retired on a minimal pension. The Ilok winemaking experience visits the same cellars where Volf built his false wall — and where the coronation Traminac still ages today.
I’ve read thousands of stories about people preserving wine through crisis. This one involves a man with a trowel, some stolen mold, and the conviction that 30,000 bottles mattered more than his own safety.
It’s not a wine story. It’s a war story that happens to involve wine.
From a Dalmatian Village to the Judgment of Paris — and Back Again
Miljenko Grgic was born on April 1, 1923, in the village of Desne on the Dalmatian coast. He grew up among vineyards. He studied winemaking. And in 1954, he did what many young Croatians did under communism — he left. He fled Yugoslavia with black-market American dollars hidden in his shoe and his winemaking textbooks tucked under his arm. He arrived in California with almost nothing except the knowledge of how grapes become something worth drinking.
He changed his name to Mike Grgich. He worked his way through Napa Valley — Souverain, Beaulieu Vineyards, Robert Mondavi — learning California’s terroir the way he’d learned Dalmatia’s, by standing in the vineyard and paying attention. In 1972, he became winemaker at Chateau Montelena.
On May 24, 1976, in Paris, a panel of French judges tasted wines blind. They were evaluating California wines against the finest Burgundies. The 1973 Chateau Montelena Chardonnay — Grgich’s wine — was ranked first.
It beat Burgundy on Burgundy’s home soil.
The event became known as the Judgment of Paris, and it redrew the map of the wine world overnight. A Croatian immigrant with smuggled textbooks had made the wine that proved California belonged at the table.
In 1996, at age 73, Grgich went home. He opened Grgic Vina in Trstenik on the Peljesac Peninsula — the same stretch of Dalmatian coast he’d fled four decades earlier. He planted Plavac Mali and Posip. The native grapes. The man who defined California’s greatest moment chose to spend his final chapter making wine from the varieties of his childhood. He died on December 13, 2023, at the age of 100.
We mapped the full route from Split to Dubrovnik as a Dalmatian Coast wine trail — including Trstenik, where Grgich finally came home.
Somewhere right now, a bottle of Plavac Mali is being opened on the Peljesac Peninsula. The person pouring it probably doesn’t know that the grape’s parent vine was hiding in a grandfather’s field until 2001. They don’t know that 30,000 bottles once survived a war behind a fake wall. They don’t know that the man who beat France in 1976 came back to this same coast to make this same wine.
They just know it tastes like where it comes from.
Croatian wine was never a secret. It was hidden — by empires, by politics, by distance. And now it isn’t.
What is Plavac Mali and how does it relate to Zinfandel?
Plavac Mali is Croatia’s signature red grape, grown primarily on the Peljesac Peninsula and Hvar Island. DNA research confirmed in 2001 that it descends from Crljenak Kastelanski (also called Tribidrag), which is genetically identical to Zinfandel. Plavac Mali is Zinfandel’s child — a natural cross with another Croatian variety called Dobricic. Dingac wines are full-bodied, often 14–17% alcohol, with dark fruit, dried herbs, and Mediterranean garrigue character.
What is the best Croatian wine region to visit?
For reds and dramatic scenery: the Peljesac Peninsula in Dalmatia, home to Dingac — Croatia’s first protected wine zone (1961) — with vineyards on 45-degree cliff faces above the Adriatic. For whites and food tourism: Istria, known for Malvazija Istarska, truffles, and olive oil. September and October (harvest season) are ideal: fewer crowds, warm weather, and working vineyards. May and June are the second-best window.
How much does Croatian wine cost?
Entry-level: EUR 7–15 per bottle in shops. Premium Dingac, aged Malvazija, or single-vineyard Posip: EUR 20–50. Restaurant glasses: EUR 3–6. Archive rarities like Ilocki Podrumi’s Traminac, poured at both the 1953 and 2023 British coronations, can reach EUR 7,400 per bottle.
What are Croatia’s most important indigenous grape varieties?
Croatia has approximately 120 indigenous varieties. The most significant: Grasevina (most planted white, dominant in Slavonia), Malvazija Istarska (55% of Istrian vines, documented since 1385), Plavac Mali (benchmark red of Dalmatia, Dingac and Postup appellations), Posip (white from Korcula, survived phylloxera on original rootstock), Crljenak Kastelanski/Tribidrag (genetically identical to Zinfandel, nearly extinct — nine vines found in 2001), Babic (northern Dalmatia red), Bogdanusa (white from Hvar, meaning “Given by God”), and Debit (white from Sibenik, named for paying tax debts during the Napoleonic era).
What is the Dingac wine appellation?
Dingac is Croatia’s oldest protected wine zone, legally recognised since 1961 on the Peljesac Peninsula’s southwest-facing slopes. It covers 758 hectares total with 78.5 hectares under vine, producing only Plavac Mali. The terrain reaches 45-degree slopes at up to 300 metres altitude, with 2,800+ annual sunshine hours and triple insolation from sun, karst rock, and sea. Before 1975, donkeys hauled grapes on goat paths spanning nearly 20 kilometres. A 400-metre tunnel opened in November 1975 cut the journey to 4 kilometres.
Did Croatia produce wine before the current tourist boom?
Greek settlers brought viticulture to Hvar and Vis around 400 BC — 2,500 years of continuous production through Roman, Venetian, Ottoman, and Habsburg rule. Phylloxera devastated the vines in the late 19th century. Yugoslav collectivisation suppressed private winemaking entirely. After independence in 1991, private producers grew from roughly 700 (2000) to around 1,800 (2015). The wines were never new — they were inaccessible.
Written by Oliver Laiho with AI assistance. Facts researched against primary sources including UC Davis genetic studies, Croatian wine authority records, and winery documentation. If you spot an error, let us know.
