Lodi: Listening to the Vines
At large international tastings, it is easy to lose track of geography. There are hundreds of regions, thousands of wines and endless claims of uniqueness. In such an environment, most appellations try to shout louder.
Lodi does the opposite.
At a recent tasting at WineParis organised by the California Wine Institute and Lodi Winegrape Commission, the focus was not on prestige or luxury positioning, but on something far more fundamental: old vines, soil, water, and the long memory of vineyards.
Led by Stuart Spencer, Owner and Winemaker at St.Amant Winery, the session guided the audience through the agricultural logic that has shaped the region for over a century. The result was not just a presentation of the region, but a deeper explanation of why Lodi has become one of California's most important reservoirs of historic vineyards.
Four wines framed the discussion:
- Ironstone Rous Vineyard Zinfandel 2022
- LangeTwins Starr Vineyard Zinfandel 2022
- Michael David Freakshow Zinfandel 2022
- Klinker Brick Marisa Vineyard Zinfandel 2023
But the wines were almost secondary.
To understand Lodi, one must first grasp the forces that enabled these vineyards to survive — its rivers, sandy soils and farming philosophy, now formalised in the Lodi Rules sustainability framework.
And that story begins not in the cellar, but in the landscape.
Landscape and Rivers: The Geography Behind Lodi’s Old Vines
While the wines provide an entry point to Lodi, the real explanation begins with geography.
The region covers around 82,000 acres of vineyards today, making it one of the largest wine-growing areas in California. Yet within this lies a much more concentrated historical centre. Of Lodi’s seven AVAs, the Mokelumne River AVA is the true heart of the region, containing around 28,000 acres of vineyards and most of its historic plantings.
Many of Lodi’s old vines can still be found here.
One reason for this is the structure of agriculture here. Unlike the newer vineyard developments in the northern and eastern parts of the region, where large companies often manage vineyard blocks of 100 or even 200 acres, the Mokelumne River area still reflects an older agricultural pattern. Vineyards are often divided into smaller, family-run plots, sometimes covering just five acres or slightly more. Consequently, the landscape boasts an unusual diversity of varieties and vineyard histories.
However, the deeper explanation for Lodi’s viticulture lies in the region's water and soil.
Three rivers shape the region’s geography: the Calaveras River to the south, the Mokelumne River, which flows directly through the city of Lodi, and the Cosumnes River, which descends from the Sierra Nevada mountains further north. The names Mokelumne and Cosumnes originate from Native American languages, serving as a reminder that this agricultural landscape predates California’s modern wine industry by a considerable amount of time.
However, what matters most is how these rivers interact with the wider Californian landscape.
Water flowing from the Sierra Nevada snowpack drains westward towards the San Francisco Bay, moving through rivers, streams, and underground aquifers that pass directly through the Lodi area. In a state where drought conditions are becoming increasingly prevalent, this hydrological position gives Lodi something that many other regions lack: reliable access to water.
The Cosumnes River adds an additional layer to this system. As the only undammed river descending from the Sierra Nevada, it still experiences seasonal flooding during wet years. These floods deposit new layers of sediment across parts of the valley floor, continually reshaping the region's soil profile.
It is precisely this geological process that created one of Lodi’s defining characteristics.
Much of the Mokelumne River AVA sits on a broad alluvial fan of granitic sand that has been carried down from the mountains over thousands of years. The dominant soil type here is known locally as Tokay Fine Sandy Loam. At first glance, it appears unremarkable — light, loose, and almost powdery in texture — but it has had profound consequences for viticulture.
These sandy soils drain extremely well, enabling growers to control vine vigour and manage water uptake with exceptional precision. More importantly, however, they have provided natural protection from one of the most destructive pests in viticultural history:
Phylloxera.
When the phylloxera epidemic swept through vineyards across Europe and later California in the late nineteenth century, most regions were forced to replant their vineyards with resistant rootstocks. In Lodi, however, the pest struggled to survive in the sandy soils.
Consequently, many vineyards were never destroyed.
Even today, the region contains one of the largest concentrations of old own-rooted vines anywhere in the world. These vines grow on their original root systems rather than grafted rootstocks — a rare phenomenon in global viticulture.
The combination of river systems, sandy soils and access to water explains why Lodi’s vineyards have endured for so long.
It is also why the region still holds such an extraordinary archive of historic plant material.
The story naturally turns next to the vines themselves and the question that is increasingly concerning growers around the world:
Why do old vines matter, and why are they worth protecting today?
Old Vines: Why Lodi Still Has Them
While Lodi’s geography explains how the vineyards survived, the next question is why the vines still matter today.
The region currently has more own-rooted old vines than almost anywhere else in California and possibly more than many other wine regions worldwide. The explanation again goes back to the sandy soils of the Mokelumne River area.
Phylloxera, the tiny insect that eats roots and devastated European vineyards in the nineteenth century before spreading across California, simply does not thrive in sand. When the pest began destroying vineyards along the Californian coast in the 1880s, most growers were forced to replant using resistant rootstocks.
But in Lodi, many vineyards remained untouched.
Consequently, a remarkable number of vines here still grow on their original roots rather than on the grafted American rootstocks, such as St. George, that became standard elsewhere.
This historical accident has created something rare in modern viticulture: vineyards that have evolved continuously in the same soil for over a century.
One of the sites mentioned during the tasting was planted in 1901 and still produces fruit today.
From a modern agricultural perspective, this is almost irrational.
A contemporary vineyard designed for large-scale, efficient wine production might yield ten to twelve tons of grapes per acre. Old vineyards like this one typically produce only three to four tons. From an economic standpoint, replacing them would seem obvious.
Yet many growers continue to keep these vines in the ground.
One reason for this is how vineyards behave as they age.
Young vines tend to grow vigorously, often producing an excessive canopy, which requires careful management to strike a balance between vegetative growth and fruit production. Older vines behave differently. Over time, they naturally reduce their vigour and enter a state of self-regulation, whereby the vine distributes its energy more evenly between growth and ripening.
This often leads to more consistent yields and greater concentration in the fruit.
Old vines also develop deep root systems, sometimes extending several metres below the surface. In a relatively flat and homogeneous region like Lodi, these roots enable the vine to access subtle variations in soil composition and moisture.
Consequently, wines from neighbouring old vineyards can taste quite different from each other.
However, the most fascinating aspect of old vineyards is perhaps their capacity for adaptation.
Over decades — and sometimes over a century — vines experience cycles of heat, drought, pests, and disease. Those that survive gradually adjust to these stresses. Some researchers describe this process in terms of epigenetic adaptation — the idea that plants can pass on certain environmental responses to the next generation when propagated from cuttings.
In other words, an old vineyard carries a form of accumulated knowledge.
Each vine represents a long history of survival in its specific location.
This is one reason why many growers and researchers now view old vineyards as not only agricultural assets, but also as genetic and cultural archives of viticulture.
Yet they remain vulnerable.
This is because maintaining low-yielding historic vineyards can be financially difficult in the current global wine market. With wine consumption declining in some markets and production costs rising, growers are under pressure to remove old vines and replace them with more productive varieties.
Therefore, preserving these vineyards depends on something beyond agriculture.
It depends on whether the wine world continues to recognise their value.
Sustainability in Practice: The Philosophy Behind Lodi Rules
Old vines reveal Lodi's past, while sustainability defines how the region is trying to protect its future.
Long before sustainability became a central theme in global wine marketing, growers in Lodi were already trying to understand how to farm their vineyards in a way that would preserve the land and the region's economic viability. This effort eventually took shape in the programme known as Lodi Rules, which is one of the most comprehensive sustainability frameworks in American viticulture.
Unlike many certification systems that focus primarily on environmental checklists, the Lodi Rules programme was designed as a broader agricultural philosophy. It encompasses soil health, biodiversity, water management, social responsibility, and long-term economic sustainability for growers.
In other words, sustainability is not treated as a branding tool here, but as a practical system for managing vineyards over generations.
Water management is a good example of this approach.
Historically, many Lodi vineyards were irrigated using the traditional furrow method, whereby water flows through shallow channels between rows of vines, flooding the soil and allowing it to gradually soak into the root zone. While this technique may appear inefficient by modern standards, it served several important functions.
The flooding helped to cool the soil during hot summers, to flush accumulated salts deeper into the ground and to maintain a natural balance in the vineyard ecosystem.
As research and technology evolved, many growers shifted towards drip irrigation, which delivers water directly to the root zone in carefully controlled amounts. This system dramatically improves water efficiency and enables growers to control vine growth throughout the season.
However, drip irrigation also introduced new challenges.
Without periodic flooding, salts can gradually accumulate in the upper soil layers. Consequently, some vineyards today combine both systems, using drip irrigation during the growing season and occasionally returning to flood irrigation to leach salts from the soil and maintain its health.
Such adaptive practices exemplify the pragmatic approach that has characterised viticulture in Lodi for decades.
Another important aspect of sustainable farming in the region is canopy management and vineyard work. Varieties such as Zinfandel require careful attention throughout the growing season. Growers often perform shoot thinning in spring to remove excess growth, thereby improving airflow and reducing cluster crowding within the canopy.
This is particularly important for Zinfandel, as its thin skins and tightly packed clusters make it vulnerable to rot if humidity becomes trapped in the fruit zone.
Zinfandel also presents the challenge of uneven ripening.
Within a single cluster, berries can mature at very different rates. This complicates sampling and harvest decisions. Growers may measure sugar levels in the vineyard, only to see them rise dramatically within a few days — particularly during the late-summer heatwaves that are common in California. In some seasons, sugars can increase by four or even five degrees Brix in less than a week.
Managing this variability requires experience and flexibility in the vineyard.
Taken together, these practices demonstrate that sustainability in Lodi cannot be reduced to a single certification or technical measure. Instead, it emerges from a long-standing culture of practical farming — a willingness to adapt techniques while maintaining respect for the land and the vineyards themselves.
In many ways, the programme formalised something that had already existed in the region for generations.
As climate pressures increase across global wine regions, this pragmatic approach to sustainability could become one of Lodi’s most significant contributions to the wider discussion about the future of viticulture.
Tasting the Landscape: Four Expressions of Lodi Zinfandel
After discussing maps, soils and viticulture, the conversation finally returned to the wine itself.
The tasting illustrated how Lodi's landscape — its sandy soils, old vineyards and farming traditions — translates into style. Four wines framed the discussion, each offering a slightly different interpretation of Zinfandel from the historic heart of the region.
Together, they demonstrated the diversity of Lodi and the subtle yet distinct ways in which old vineyards can influence expression.
The first wine was the Ironstone Rous Vineyard Zinfandel 2022, from a historic site planted on its own roots in the sandy soils of the Mokelumne River area. Vineyards like this one represent the classic agricultural structure of Lodi, with relatively small parcels that have remained in production for generations.
In the glass, the wine reflected what many growers describe as the hallmark of Lodi Zinfandel: generous fruit, softness, and approachability. The sandy soils tend to produce wines that emphasise brightness and roundness rather than aggressive structure, allowing the fruit to remain the central element of the wine.
This style has long distinguished Lodi from other Californian Zinfandel regions, such as Sonoma County and Amador County, where the wines often have a greater emphasis on power and tannic structure.
LangeTwins Starr Vineyard Zinfandel 2022
The second wine came from Starr Vineyard, which is farmed by the Lange family. They are one of Lodi's long-established grower families. The vineyard is around half a century old, illustrating another important stage in a vineyard's life: it is old enough to have achieved natural balance, yet still capable of reliable production.
In many ways, this wine represented the middle ground of Lodi viticulture. It showed the concentration and depth that older vines can provide while retaining the fruit-driven character typical of the region.
Tasting vineyards like this makes it increasingly clear how even small differences in location — soil depth, microclimate and irrigation patterns — can produce noticeably different wines, despite the region’s apparently uniform landscape.
Michael David Freakshow Zinfandel 2022
While the first two wines reflected Lodi’s historic vineyards, the Freakshow Zinfandel represented the region’s more modern face.
Produced by Michael David Winery, a longtime advocate of Zinfandel in Lodi, the wine is made from fruit sourced from multiple vineyards rather than a single site. The winery gained recognition in the early 2000s with its well-known Seven Deadly Zins label, and Freakshow continues that tradition with a deliberately bold visual identity designed to attract a younger audience.
The wine itself reflects a style of Zinfandel that has become popular in California over the last two decades: riper, fuller-bodied, and more expressive. It is often harvested at higher sugar levels to emphasise its richness and intensity.
Yet even here, the conversation around Zinfandel is evolving. Many winemakers in Lodi are increasingly experimenting with earlier harvest dates, recognising that the variety can deliver vibrant fruit character even at lower sugar levels.
Klinker Brick Marisa Vineyard Zinfandel 2023
The final wine of the tasting returned to the theme of historic vineyards.
Marisa Vineyard, planted in 1928, is another example of the remarkable longevity of Lodi’s old vine sites. Despite its age, the vineyard continues to produce viable yields, demonstrating the self-regulating balance that older vines can achieve over time.
The wine displayed a slightly different stylistic approach, showcasing a more pronounced oak influence and a deeper structural profile compared to the earlier wines. Yet the underlying character remained unmistakably Lodi: generous fruit, warmth, and an overall sense of openness rather than austerity.
Taken together, the four wines demonstrated something important:
While Lodi may appear geographically simple, in the glass it reveals surprising diversity.
Old vines, sandy soils and thoughtful vineyard management combine to produce wines defined not by power or prestige, but by clarity of fruit and a distinctive sense of place.
In a global wine landscape often dominated by louder narratives, this quiet authenticity may well be Lodi's greatest strength.
Old Vines and Sustainable Viticulture: Why Lodi Matters
While the geography of Lodi explains why the vineyards survived, the next question is why they still matter today.
The answer lies not only in heritage, but also in an increasing focus on sustainability.
Lodi currently boasts one of the largest concentrations of own-rooted old vines in California and possibly the world. The reason for this goes back once again to the sandy soils of the Mokelumne River area. When phylloxera swept through California in the late nineteenth century, devastating vineyards along the coast and forcing most regions to replant with resistant rootstocks, the pest struggled to survive in Lodi’s deep, sandy soils.
Consequently, many vineyards here were never destroyed.
Even today, a remarkable number of vines continue to grow on their original root systems rather than on grafted rootstocks such as St. George, which became standard across much of California. This historical accident has created something rare in modern viticulture: vineyards that have remained in the same soil and genetic material for over a century.
One of the vineyards mentioned during the tasting was planted in 1901 and still produces fruit today.
From an economic perspective, this longevity seems counterintuitive. Modern vineyards designed for efficiency typically yield ten to twelve tons of grapes per acre. Old vineyards in Lodi typically produce three to four tons. Maintaining them requires commitment from growers and support from wineries willing to pay a higher price for the fruit.
Yet these vineyards persist, partly because of the way vines behave as they age.
Young vines tend to grow vigorously and often require careful intervention to strike a balance between vegetative growth and fruit ripening. Older vines, by contrast, gradually move towards a natural equilibrium. Their vigour declines, their yields become more moderate, and they distribute their energy more evenly between their canopies and their fruit.
In viticultural terms, they become self-regulating systems.
This natural balance reduces the need for intensive vineyard management and often results in more consistent fruit quality from year to year. Deep root systems, developed over decades, enable the vines to access moisture and nutrients far below the surface. In a visually uniform region like Lodi, these roots reveal subtle variations in soil composition and water availability, resulting in distinctive characteristics of individual vineyards.
However, the most fascinating aspect of old vines is perhaps their capacity for adaptation.
Over the decades, vineyards experience cycles of drought, heatwaves, disease and pest pressure. The vines that survive gradually adjust to these stresses. Some researchers describe this process in terms of epigenetic adaptation — the idea that plants can transmit environmental responses through cuttings used for propagation.
In this sense, an old vineyard is more than just a historical artefact. It is also a biological archive of resilience, carrying within it the accumulated experience of a specific site.
This concept is becoming increasingly relevant as wine regions around the world confront the realities of climate change. Old vineyards, which are already adapted to local conditions, may offer valuable insights into how vines can survive under future climatic pressures.
At the same time, however, these vineyards also highlight another challenge facing the modern wine industry.
This is because sustainability is not only an environmental issue, but an economic one too.
Old vineyards produce smaller crops and require careful farming. Without a market willing to recognise their value, many growers are under pressure to remove them and replace them with higher-yielding, more efficient plantings.
Therefore, the future of old vines in Lodi depends on both farming practices and the relationships among growers, wineries, and consumers. Preserving these vineyards means acknowledging that their value lies in the depth of their history, their ability to adapt and the character they impart to the wines, rather than in maximum yield.
In many ways, Lodi offers a compelling example of what sustainable viticulture can look like in practice: vineyards shaped not by short production cycles, but by decades — sometimes more than a century — of continuous life in the same soil.
Looking Forward: What Lodi’s Old Vines Tell Us About the Future
Together, Lodi's vineyards and wines reveal something that extends well beyond the boundaries of one Californian region.
They offer a glimpse into an alternative viticultural model.
For decades, much of the global wine industry has moved towards efficiency, with careful selection of clones, uniform planting material, higher-yielding trellised vineyards and vineyard cycles designed around predictable production timelines. This system has undoubtedly brought remarkable technical precision to winemaking.
However, it has also introduced new vulnerabilities.
Uniform plant material can reduce genetic diversity. Intensive production systems can weaken long-term resilience. Furthermore, vineyards designed primarily for efficiency are often less adaptable when environmental conditions begin to change.
In this context, Lodi’s old vineyards are becoming increasingly valuable.
As many of these vines have remained in the ground for generations, they possess a degree of genetic diversity that is rarely found in modern vineyards. Rather than being made up of a single selected clone, older plantings often contain a mixture of plant material that has evolved under local conditions over decades.
Growers and researchers are therefore beginning to examine these vineyards more closely as potential reservoirs of genetic material that could be important in the future.
This concept is sometimes referred to as vine adaptation or epigenetic memory — the idea that vines gradually adjust to environmental stresses experienced over time. Factors such as heat, drought, pests and disease all leave their mark on the vineyard. The vines that survive become better suited to their environment, in effect.
When propagated carefully, this accumulated resilience can be passed on to future plantings.
In this sense, old vineyards function as historical landmarks and living laboratories of adaptation.
However, their survival cannot be taken for granted.
As discussed throughout the tasting, maintaining historic vineyards is rarely the most economically efficient choice. Lower yields mean lower immediate returns, and the global slowdown in wine consumption has intensified the financial pressures on growers.
Many vineyard owners therefore face a difficult decision: should they preserve the old vines with their lower production, or replace them with modern plantings designed for higher output?
The future of these vineyards, therefore, hinges on more than just agricultural practices.
It depends on whether the wine world continues to recognise their value.
Lodi offers a compelling example of how sustainability, history, and practical farming knowledge can intersect. The region’s sandy soils protected many vineyards from phylloxera. Its river systems also provided a reliable water supply in challenging climatic conditions. Generations of growers have maintained vineyards that might otherwise have disappeared.
Together, these elements have created one of the largest landscapes of historic vines in California.
Perhaps that is Lodi's quiet lesson.
In a wine world often driven by novelty, the future of viticulture may sometimes lie not in the newest vineyards, but in those that have already proven their ability to survive for over a century.