- for the "blanc sec" : sémillon 58%, sauvignon 21%, muscadelle 10%, ugni blanc 9%.
- for the "blanc doux" (sweety wine, for desserts or foie gras) : sémillon 73%, sauvignon 21%, muscadelle 6%.
Each winegrower has to "assemble" the juices of the different grapes he grows, to get the result he wants.
In other regions, it is forbidden to use more than one variety of grape to make the wine (i.e. Sancerre or Pouilly-Fumé, which use only Sauvignon in their white wines)