It is also said that wines are made in the vineyard. To some extent that is true, the finer the grapes at the start, the finer the possibilities for the wine. However, the stylistic decisions of winemakers are the keys to great wines. Decisions on which yeast to use, fermentation temperatures, maceration of the fruit, which combination of barrels in which to age the wine, the length of barrel and bottle aging and finally the skill in blending all determine the quality of a wine.