A field blend wine comes from a single vineyard planted with multiple grape varieties that grow together, get picked together, and ferment together in the same tank. That last part, co-fermentation, is what separates a true field blend from a regular blend, where wines are made separately by variety and combined afterward in the cellar. It is one of the oldest ways to make wine, and it very nearly disappeared.
Field Blend vs. Blend: What's the Actual Difference?
Most wine you have had labeled as a "blend" was made this way: grapes are picked variety by variety, often from separate blocks or even separate vineyards, fermented on their own, and then a winemaker tastes through the finished lots and decides on a ratio, blending them together before bottling. That is cellar blending, and it gives a winemaker enormous control. Each variety can be picked at its own ideal ripeness, fermented with its own approach, and the final blend can be adjusted vintage to vintage to hit a consistent house style.
A field blend skips almost all of that control. The varieties are interplanted in the same vineyard rows, sometimes deliberately, sometimes because that is just how the vineyard was planted a hundred years ago. Everything gets harvested on the same day regardless of which grape is riper, and it all goes into the same fermentation vessel together. The wine that results is not really "blended" in the winery at all. The vineyard did the blending, years before anyone picked a single grape (Decanter).
Where Did Field Blends Come From?
Field blending is not a trend. It is closer to the default setting of winemaking before the modern era decided single varieties were preferable.
In California, field blends were standard practice in vineyards planted before Prohibition and, further back, before phylloxera devastated European vineyards in the late 1800s. Growers, many of them Italian immigrants, interplanted zinfandel with petite sirah, carignane, alicante bouschet, and whatever else grew well on a given hillside, a style now sometimes called "mixed blacks" (Sommelier India). It was not really a stylistic choice so much as a hedge. Different varieties ripen at different times and respond differently to frost, disease, and a rough season, so a mixed vineyard was less likely to lose an entire crop to one bad stretch of weather. A handful of these century-old vineyards are still farmed and still co-fermented today, and the wines they produce cannot really be replicated, because you cannot go plant a hundred-year-old vineyard.
Vienna, Austria, has its own version, and it is the most formalized field blend tradition in the world. Wiener Gemischter Satz, meaning "Viennese mixed planting," requires at least three white grape varieties interplanted in a single vineyard within Vienna's city limits, harvested and fermented together, with no single variety allowed to exceed 50% of the blend (Austrian Wine). It earned its own DAC, the Austrian equivalent of an appellation, in 2013, which is a rare case of a co-fermented field blend getting formal, legal recognition as its own category rather than just an old-fashioned curiosity.
Why Did Field Blends Nearly Disappear?
The short answer is that the wine industry, especially from the mid-twentieth century on, organized itself around varietal clarity. Wine schools, regulatory bodies, and large producers built a system based on picking one variety at a time, fermenting it separately, and controlling the final blend with precision. That system has real advantages: consistency, the ability to fine-tune a wine vintage to vintage, and labeling laws that reward naming a single grape on the bottle. Old interplanted vineyards, meanwhile, were expensive to farm, hard to mechanize, and did not fit neatly into a system built around single varieties. Many were pulled out and replanted to one grape at a time. What is left today is mostly what survived by accident: old vineyards nobody got around to replacing, plus a newer wave of producers replanting field blends on purpose because they like what the method does to the wine.
What Does Co-Fermentation Actually Do?
This is the part that is easy to state and harder to fully explain, but winemakers who work this way consistently describe the same effect: co-fermented wines feel more integrated than the same varieties blended after the fact.
When different grapes ferment together, their compounds interact with each other during fermentation itself, not after each wine already has its own finished character. Aromatic compounds, tannins, and phenolics from each variety are extracted and can bind or interact while everything is still must and wine-in-progress, rather than getting combined as two or three already-finished wines (WineMaker Magazine). Winemakers who have made both versions of the same fruit, field-blended and separately-fermented-then-blended, often note that a small percentage of an aromatic variety reads much louder in a straight blend than it does in a co-fermentation, where the same grape's character gets woven in more subtly (ywine.club). Practically, this tends to show up as more textural complexity and a sense that the wine is one thing rather than several things stacked together. It is difficult to measure precisely, but it is one of the more consistent observations across winemakers who have tried both approaches side by side.
Why Field Blends Fit a Low-Intervention Approach
Field blends ask a winemaker to give up a certain amount of control, and that fits naturally with a low-intervention philosophy. You do not get to cherry-pick the ideal harvest date for each variety. You do not get to adjust the ratio after tasting through the cellar. You take what the vineyard gives you on one picking day and let native yeast take it from there. That is a very different posture than engineering a wine to a target profile, and it is closer to how wine was made before modern winemaking had the tools to fine-tune everything. For growers and winemakers who believe the vineyard should do most of the talking, a field blend is close to the purest expression of that idea. It is also, often, a way of preserving old vineyards and old plantings that would otherwise get pulled out in favor of something easier to manage.
Coteau Pavot's Atelier Series and Field Blends
Our Atelier series is where we make field blends and house cuvées, wines built more around a specific site and vintage than around a single variety's marketing appeal. The 2023 Sonoma "Atelier" White Field Blend comes from Leake Family Vineyard and Clos Vineburg in the Sonoma Valley AVA, both old, interplanted sites growing multiple white varieties together. We pick and ferment it the way a field blend is supposed to be made: everything harvested together, fermented with native yeast, and bottled as one wine rather than assembled from parts. It is not trying to taste like any single grape. It is trying to taste like that vineyard, in that year, which is really the whole point of making wine this way.
This approach sits alongside the rest of what we believe about winemaking generally, the same thinking behind our stance on organic and biodynamic farming: let the vineyard lead, and interfere as little as possible with what it gives you.
Frequently Asked Questions
What is a field blend in simple terms? It is a wine made from multiple grape varieties that grow in the same vineyard, get picked on the same day, and ferment together in the same vessel, rather than being made separately and blended later.
Is a field blend the same as co-fermentation? They are closely related. Co-fermentation refers to fermenting multiple varieties together, which is exactly what happens in a field blend. You can co-ferment grapes that were not necessarily grown in the same field, but a true field blend always involves co-fermentation because the varieties are harvested together from one interplanted vineyard.
How is a field blend different from a regular blend? A regular blend is made from varieties fermented separately and combined by the winemaker after the fact, often with a lot of precision and control. A field blend is determined by the vineyard itself, since the grapes grow together, get picked together, and ferment together with no separate lots to choose from.
Why did winemakers stop planting field blends? Modern winemaking favored single-variety vineyards because they are easier to farm, easier to mechanize, and give winemakers more control over the final blend. Many old interplanted vineyards were pulled out and replanted to one grape at a time, though some historic sites survived and a newer generation of growers is planting them again on purpose.
Do field blends taste better than regular blends? Not necessarily better, but often different. Many winemakers who have made both versions describe field blends as feeling more integrated and textural, since the varieties interact with each other during fermentation rather than being combined afterward as finished wines.
Basile Senesi is co-founder and winemaker at Coteau Pavot.
If old-vineyard field blends interest you, our wine club is a good way to try the Atelier series as new releases come out.