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Wine 101Conventional vs biodynamic vs natural wine
Walk into any wine shop and you'll see words like organic, biodynamic and natural on the shelf tags. They sound similar, but they describe different things: how the grapes are farmed, how the wine is made in the cellar, or both. Here's the plain-English version.
Conventional wine
Most of the world's wine is conventional. In the vineyard, that can include synthetic fertilizers, herbicides and pesticides. In the cellar, the winemaker has a big toolbox: cultivated yeasts picked for reliable flavor, small adjustments to acidity or sugar, fining and filtering to make the wine clear and stable, and sulfur dioxide as a preservative. The legal ceiling for added sulfites in the US is 350 parts per million.
That toolbox isn't a bad thing. It's why an affordable bottle tastes the same year after year, and plenty of excellent wines are made this way. Conventional simply means the winemaker uses the full modern toolkit.
Biodynamic wine
Biodynamic is mainly a farming philosophy, based on lectures given by Rudolf Steiner in the 1920s. It starts with organic farming, meaning no synthetic pesticides, herbicides or fertilizers, then treats the whole vineyard as one living ecosystem. Growers use compost, cover plants and animals to build healthy soil, and they apply special herbal and mineral preparations in tiny amounts.
The most famous is Preparation 500, cow manure packed into a cow horn, buried over winter, then diluted and sprayed on the soil. Preparation 501 is ground quartz sprayed on the leaves. Many growers also follow a calendar that sorts days into root, leaf, flower and fruit days to time tasks like pruning and harvest. The horn preparations and the moon calendar are the most debated part, and their effects are hard to prove either way.
Certification, such as Demeter or Biodyvin, requires organic farming first and sets some cellar rules too, like native yeasts and lower sulfite limits. But because biodynamic is mostly about the vineyard, what happens in the winery can still vary from producer to producer.
Natural wine
Natural wine is mostly about the cellar, and the motto is nothing added, nothing taken away. The grapes are usually farmed organically or biodynamically and picked by hand. The juice ferments with the wild yeasts already on the grapes and in the winery, and the winemaker uses little or no sulfur and often skips fining and filtering, which is why some natural wines look cloudy.
There's no single legal definition, and the word natural can't be certified in most places. France has a voluntary label called Vin Méthode Nature. It requires certified organic grapes, hand harvesting and native yeasts, bans harsh techniques like reverse osmosis and flash pasteurization, and allows no sulfur before or during fermentation, with at most 30 milligrams per liter added at bottling. It was approved by French authorities but is run by a producers' group, not the government. Italy has its own group, VinNatur, with its own rules.
Without the preservatives, natural wines can vary more from bottle to bottle, so keep them cool. They can also taste livelier, funkier or a bit cider-like. Orange wines, which are white wines fermented with their skins, are often made this way.
The short version
Conventional means the full modern toolkit, biodynamic is a farming philosophy, and natural is a low-intervention style of winemaking with no single legal definition. They can overlap, so one wine can be organic, biodynamic and natural all at once. None of these labels promises a healthier wine, and none guarantees a delicious one.
The best way to learn the difference is to taste it. Pick one grape, like Riesling or Pinot Noir, and try a conventional bottle beside a biodynamic one and a natural one. Notice which feels cleanest, which feels liveliest, and which you'd pour again.