Bordeaux is changing. The Left Bank, in particular, has long been a region of labels – of grandiose estates, polished winemakers and the bottles they produce – the vineyards a backdrop to their impressive châteaux and new state-of-the-art wineries. Of course, vineyards have mattered, as much as they’re the source of their grapes, but they’ve rarely been the focus for conversations with trade or consumers. But now, perhaps influenced by the meteoric rise of Burgundy – and an approach to wine echoed around the world, terroir is stepping into the spotlight. Behind the scenes, the Bordelais may always have been looking underfoot, but now they are talking about it too.  Nowhere is this more true than at Ch. Montrose – a property that announced a significant change when releasing its 2023 vintage. The property has always made some of Bordeaux’s finest wines, but over the past 15 years (under the Bouygues’ ownership) quality at this Saint-Estèphe estate has reached new heights. Long known for its austere age-worthiness, there’s now a modern polish that softens its stern style – without sacrificing its classicism and longevity. Each vintage seems to reveal a new level of precision and finesse. From 2023, Montrose announced that its Grand Vin would only come from Terrace 4 (T4). If that doesn’t mean much to you, I’m not surprised.  The Médoc and Graves’s six gravel terraces were uncovered by Pierre Becheler in a series of studies in the 1980s and ’90s. Each terrace dates from a different period and has its own distinct soils, with Terrace 1 (T1) the oldest and Terrace 6 (T6) the youngest – and argued to be a defining factor in the Left Bank’s terroir. T3 and T4 are widely regarded as the best for wine-growing, and Becheler found that, at the time of their classification in 1855, over 80% of the Classed Growths sat on these two distinct geological strata.  In the last decade, these gravel mounds have become a key part of Bordeaux’s story, explaining the estates’ terroir. Despite widespread understanding that the terraces are integral to the quality of wine, there still isn’t a comprehensive map of the Left Bank’s terroir – showing which vineyards sit on which soils (the best are those created by Jane Anson and Kees van Leeuwen for Anson’s book Inside Bordeaux). Most studies have been undertaken by individual estates, as at Montrose – who engaged Becheler himself to uncover the specifics of their site.  It's remarkable that, without knowing anything about the region’s subsoils, Montrose was so fortuitously placed – although it has of course survived thanks to its prestigious site. The property’s first vines were planted – all on the fabled T4 – in 1815, by Etienne Théodore Dumoulin, who had purchased the land from Nicolas Alexandre de Ségur (of Calon Ségur). The land had been covered in heather, its pink blossom covering the gentle slope come autumn, and sailors passing along the Gironde estuary used to call it the pink hill – or “mont rose”, giving the property its name.  It was only 40 years after the first vines went in the ground that the estate earned its place as a Second Growth in the 1855 Classification. By 1861, when Dumoulin passed away, the estate comprised 95 hectares – but its borders have shifted over the years. It was later purchased by an Alsace factory owner, Mathieu Dolfus, who invested heavily in the property. He was a visionary – offering free healthcare, profit sharing and accommodation on the estate for his workers. He even used a wind turbine to flood the vineyards, staving off the impact of phylloxera as long as he could.  Montrose was managed by the Charmolüe family between 1896 and 2006, with Jean-Louis – who ran the estate from 1960 – key in building its modern reputation. It was under him, in the 1970s, that vines were planted on lower-lying land close to the estuary, which sits on T5. These humid, sandy parcels are now used for La Dame de Montrose, the château’s second wine.  It was in 2006 that brothers Olivier and Martin Bouygues (of the eponymous telecoms company) acquired the property. In 2010 they bought an additional 22 hectares from Phélan Ségur, land which had historically been part of Montrose. These vineyards, wooded on either side, sit on the sandier T3, but importantly also brought the total vineyard area back to 95 hectares – as under Dumoulin – and all sitting in one block (something which is relatively rare in Bordeaux).  The Bouygues brothers hired Vincent Decup as the estate’s Technical Director in 2014. Decup instantly set about getting to grips with the estate and its soils. When he arrived, they had a map detailing 16 different soil types across the vineyards – but he soon commissioned further studies, uncovering an additional 10 soil types. This gave them, Decup tells me, “the possibility to explore and separate” parcels, diving into the detail of the site with a Burgundian, rather than Bordelais, vision. From 2017, the team started delineating the parcels – vinifying plots in 93 separate tanks (over twice the 40 that had been used just three years prior), adapting the winemaking to each. Looking at the Cabernet Sauvignon on T3 and T4, he explains how they gained a “new level of precision and comprehension of Cabernet on each terrace”.  “The Cabernet Sauvignon of Montrose naturally gets lots of power,” Decup tells me. “We have to be careful with the extraction.” Especially for fruit from T3, he explains, it can easily become overly austere. T4 has always represented the majority of the blend for the Grand Vin at Montrose – and in Decup’s mind it is not just the property’s historic DNA, but what gives the wine its identity. He tells me how there is something magical about the way Cabernet ripens on these parcels, developing technical (sugar), aromatic and phenolic ripeness all at once. It produces wine that is “powerful, voluminous, demonstrative – a lion in a cage”.  In 2022, the same year that Charlotte Bouygues took over as President and Pierre Graffeuille became CEO, the team started focusing more on T4, and from 2023 the Grand Vin comes exclusively from this prized terrace. Coming from the Delon estates, Graffeuille knew the potential of these soils, shared by Léoville Las Cases. The 2022 vintage was pivotal – earning four potential 100-point scores, with four firm 100-point scores in bottle – and the 2023 followed in its footsteps, with three potential perfect scores to its name.  The gravel terraces rise and fall through the region. T4 surfaces in Saint-Estèphe, running under Meyney and Montrose, disappearing until the southern edge of Pauillac, reappearing around Latour, then running through much of Saint-Julien (including the three Léovilles – Las Cases, Barton and Poyferré – and Ducru-Beaucaillou), rising again throughout Margaux and then again under Haut-Brion and La Mission Haut-Brion, with small pockets further south.  The defining factor of T4 is an iron pan beneath its sandy gravels. The sandy gravel topsoil allows young vines to develop roots easily, before they hit the compact iron layer – forcing the vines to spread horizontally rather than vertically. That compact layer is cool and retains water, feeding the vines in hot years. Decup explains how in July the topsoil might be hot, but if you dig down you can feel the chill of the iron layer – something that is perfect for Cabernet Sauvignon. At Montrose, T4 sits between 12 and 16 metres’ altitude, while elsewhere it reaches a maximum 22 metres. T4 tends to run close to the Gironde, which provides a moderating influence – especially so at Montrose, where the estuary is 4.5km wide (notably protecting the estate from frosts, such as in the brutal 1991 season – a year when Montrose produced the wine of the vintage).  As with T4, T3 runs beneath many Classed Growths – notably Cos d’Estournel, Mouton and Lafite. With sandier gravel topsoil, the key difference is that T3 doesn’t have the iron pan of T4 – the topsoil instead sitting directly on clay-limestone subsoil. Slightly higher in altitude (15-18 metres at Montrose, but generally 20-26 across the Médoc), the soils are very deep and the vines’ roots drive straight down, up to three metres or so at Montrose, Decup tells me. With less clay in the topsoil, the soils are particularly free-draining, and the vines reach down in search of water. “In terms of expression, it is not the same at all,” says Decup. He explains that while it also produces bold Cabernet Sauvignon, it’s got particular energy and length, an austerity – but “positive austerity”. Vines on T3 particularly thrive in hot, dry years, he tells me.  Montrose has an impressive 45 hectares of vines on T4, 12 on T3, a swathe on what the team describes as an “intermediate soil” – somewhere between the two terraces, and a small portion on T5. So what now of the property’s vines on T3? While the château isn’t openly confirming it, a separate bottling of T3 is set to be released – likely hitting the market in 2026, if rumours are to be believed. The rest of the fruit goes into La Dame de Montrose, and a small portion into a third wine, Tertio de Montrose (previously known as Saint-Estèphe de Montrose), which is exclusively for those working at the estate. All in all, the Grand Vin now represents circa 36% of production at Montrose – down from closer to 45%.   “T3 and T4 are, in our opinion, the terraces that produce the best viticultural results,” says Pierre Becheler, when it comes to the Médoc and Haut-Médoc. Interestingly he explains that in the Graves it’s very different, and T2, which is almost non-existent in the Médoc, produces some stunning results. He can’t fully explain why one terrace works better for wine than another, but one reason the terraces are so important is their influence on water availability. With varying proportions of clay and sizes of gravel, it’s a key element in viticulture and, eventually, wine quality. Although he has spent much of his career diving into these gravel beds, however, he’s very clear that the terraces are one very important piece of the puzzle – but will never provide the entire picture. Some terraces are the best in certain appellations, he says, “but we don’t really know why or how”.  The complexities of Bordeaux’s terroir are manifold – and some argue that the bedrock, from richer clays to hard limestones, are more influential than the gravel terraces that lie over them. On top of this, slope exposition, proximity to the Gironde, and many other elements influencing microclimate, not to mention the human influence, all contribute to the concept of “terroir”. It’s exciting to see site pushed to the fore, especially alongside an increased focus on sustainability in the vineyard. The conversation is evolving – and, if Montrose’s 2023 is anything to go by, it’s only going to push quality in the region higher than ever before.  Explore all current Montrose listing (including a special selection of ex-château stock) or read more about Bordeaux 

While long a leading estate, recent vintages of Ch. Montrose have earned sky-high scores. We sat down with the property’s Technical Director Vincent Decup to find out how the team is taking the Saint-Estèphe titan to new heights – all by looking underfoot  

Sitting down with Ch. Montrose’s Technical Director Vincent Decup to talk about its terroir, terraces and perfect-scoring vintages of the Saint-Estephe wine 

FINE+RARE: Talking terraces and terroir with Ch. Montrose 

What lies beneath: talking terraces and terroir with Ch. Montrose  

Calon Ségur was my first ever en primeur purchase. There was such hype around the 2005 vintage and I was desperate to get my hands on something, anything. At the time I was a delivery driver for a small wine merchant and it was a luxury, but I could just afford a 12-bottle case of Calon Ségur. That alone is proof of just how cheap this wine was at the time, and how little in demand. The château always had pedigree, however. It was classified as a Third Growth in 1855 – a ranking that may even have been an underestimation, given its reputation today. Evidence of wine-growing on the estate dates all the way back to the 12th century. Since then, the property has passed through the hands of some of the most important winemaking families in Bordeaux. By 1718, the Marquis de Calon owned not just Calon Ségur but Lafite Rothschild, Latour and Mouton Rothschild. With the exception of Ch. Margaux, all the future Médoc First Growths were under his management, but he famously said, “I make wine at Lafite and Latour, but my heart is at Calon.” The quote inspired the heart that adorns every bottle. More recently, the vintages produced under Georges Gasqueton in the 1920s, ’40s and ’50s remain legendary. So, what went wrong? How could an estate, favoured over Lafite and Latour, fall so far from grace? In modern times, the blame seems to have been lain firmly at the feet of Madame Denise Gasqueton who took over the property after her husband died in 1995 and managed it until her death in 2011. But current Technical Director Vincent Millet says this is an unfair assumption. And he should know. If there has been one constant at Calon Ségur through its complete transformation, it is him – having started working at Calon in 2006. “Gasqueton was very traditional in her approach,” says Millet, “but her methods were not uncommon at the time.” Millet explains how the 1970s, ’80s and even ’90s were a lean era in the Médoc. Prices for the wines hit rock bottom and costs had to be cut to survive. Philippe Gasqueton – her husband – had instigated a mass uprooting of Calon Ségur’s vines, hoping to save on labour costs, which were the estate’s biggest outgoing. Although it’s hard to believe now, they pulled up every other row of vines. While Saint-Estèphe had a great reputation for Cabernet Sauvignon, it was harder to grow than the earlier-ripening Merlot, which typically produced more fruit. As Merlot gained in popularity, plantings in the Calon vineyards grew. By the time Millet joined the estate, Merlot represented 50% of the blend at Calon.  Millet is not critical of Gasqueton’s decisions. “It was necessary to survive,” he says. But he knew Merlot was not the best variety for the Médoc and he was keen to make changes. He’d spent five years working with Ch. Margaux, Mouton, Latour, Pétrus, Haut-Brion and Lafite Rothschild, examining the effects of filtration on wine. He then joined Ch. Margaux, heading up their research development department for eight years. By the time he reached Calon, he knew that changes in the vineyard would rekindle its reputation – a disappointment to Madame Gasqueton who had invested in a new winery just a few years earlier. But Gasqueton was open to Millet’s ideas and he convinced her to build a truly state-of-the-art winery at their other estate, Ch. Capbern. “Capbern became a laboratory,” explains Millet. It was their playground, providing much of the research that would inform the work at Calon. Soon before Millet’s arrival, Gasqueton started restructuring the vineyards to make sure they met the appellation’s minimum vine density. Millet then started dividing up the vineyard and identifying the best plots and replacing the Merlot. Importantly he also insisted that rather than harvesting the Cabernet straight after the Merlot, they would wait for the fruit to be fully ripe – something he remembers having to persuade Gasqueton was necessary. “We have to act when the grapes tell us to, not the other way around,” he explains. By 2008, Cabernet Sauvignon once again represented 80% of the vineyard – the same proportion as in the estate’s legendary period in the early 20th century. By the time Gasqueton passed away in 2011, the roadmap for changing Calon’s fortunes was already in place. The estate was purchased by the insurance company Suravenir in 2012. And the new owners, much to Millet’s delight, were happy to invest in the property. As the financial constraints lessened, Millet was able to implement changes rapidly. Under the new management, Millet found he could be more selective with the fruit. He could easily distinguish the best plots, as they were all now vinified separately. Amazingly, production of the Grand Vin dropped by almost half. Between 2000 and 2005 production sat at around 180,000-200,000 bottles a year. Today they make just 100,000 bottles of the Grand Vin.  The second wine Marquis de Calon became the expression of Merlot at Calon Ségur (almost a copy of Calon’s profile under Madame Gasqueton). But today Calon Ségur is distinctly Cabernet-driven and it is what Millet believes is the best interpretation of Calon Ségur and Saint-Estèphe’s terroir. There’s much more to the wine than Cabernet, however. “Calon Ségur is all about finesse,” he says. “It doesn’t have the terroir to make the powerful wines of Ch. Montrose or Cos d’Estournel. The wine would be too rustic if we tried to make it more powerful.” It’s this elegance that makes it unique in the appellation, defying Saint-Estèphe’s reputation for chunky, slightly awkward tannins. Today, the estate is firing on all cylinders and it has become the darling of Saint-Estèphe.  With its change in fortune, financial security and the capable hands of Vincent Millet, the property has rediscovered its terroir – the one thing that hasn’t changed over the centuries. I still have one bottle left of that first case of 2005 I bought – and it turns out, despite being the only thing I could afford, it was a brilliant buy. Having been able to taste through every vintage since has been fascinating, allowing me to follow the estate’s journey. Maybe with the final bottle, I will toast its 20th birthday. It will neatly mark a fascinating transformation of this once ugly duckling estate – that today has become Saint-Estèphe’s most elegant. Explore all current Calon Ségur listings or read more Editorial

Until relatively recently, Saint-Estèphe estate Calon Ségur rarely lived up to its Third Growth status, but today it is one of the region’s most in-demand names. Gavin Smith speaks to winemaker Vincent Millet about this property’s miraculous transformation 

Calon Segur’s winemaker Vincent Millet on this Saint-Estephe ugly duckling estate’s miraculous transformation

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