Concept
Organic vs Biodynamic
Organic farming defines what you avoid (synthetic chemicals). Biodynamic farming adds a fixed set of preparations, a cosmic calendar, and whole-farm logic on top of organic.
Most English-language wine writing treats organic and biodynamic as a spectrum, with biodynamic at the strict end. That framing is half right. The two systems share a starting point but answer different questions, and the gap matters when you read a back label.
Organic answers “what to leave out”
Organic certification, whether EU-Bio with the green leaf logo, USDA Organic in the United States, or Soil Association in the UK, is built on a negative definition. No synthetic pesticides. No synthetic herbicides. No synthetic fertilisers. No GMOs. The rules govern inputs, not outcomes. A vineyard can be certified organic and still farm in a monoculture, irrigate heavily, and use copper sulphate aggressively against mildew, because copper is naturally occurring.
In the cellar, EU organic wine has had its own standard since 2012. It caps total sulphites lower than conventional wine and restricts certain additives. USDA Organic is stricter, banning added sulphites entirely, which is why most American “organic wine” carries the softer “made with organic grapes” wording instead.
Biodynamic answers “what to do”
Biodynamic farming starts from the organic baseline and then prescribes a positive set of actions. Apply the nine field preparations on a documented schedule. Treat the farm as one closed-loop organism with its own animals, cover crops, and composting. Time vineyard work to the lunar and planetary calendar. Cap cellar interventions tightly.
The difference is structural. Organic is a list of bans. Biodynamic is a list of obligations layered on top of those bans. Every certified biodynamic vineyard is also organic. The reverse is not true.
How that shows up on a bottle
A wine carrying EU-Bio or USDA Organic tells you the grapes were grown without synthetic chemicals. It tells you almost nothing about cellar practice, vineyard biodiversity, or how the farm fits together.
A wine carrying Demeter or Biodyvin tells you all of the above plus the whole-farm requirement, the preparations, and the calendar. It also signals tighter cellar rules, including lower sulphite caps and a shorter list of permitted additives.
Many top estates run biodynamically without any logo at all. Leroy, Lalou Bize-Leroy’s domaine in Burgundy, is the most famous example. The absence of certification does not prove much either way. The presence of one does.
A common confusion
You will see producers describe themselves as “natural” wine producers. Natural wine has no certifying body and no fixed definition. It usually means minimal intervention in the cellar, native yeasts, no fining, no filtration, very low or zero added sulphites. Isabelle Legeron MW’s Natural Wine and her RAW Wine fairs in London and New York have done the most to codify the conversation, but the term remains philosophical rather than regulated. Many natural-wine producers farm biodynamically. Not all of them are certified for it.