Inoculated yeast (or cultured yeast) refers to commercially produced yeast strains added to grape juice before fermentation. Inoculated yeasts are carefully selected for their fermentation characteristics, flavour contributions, and reliability. The practice ensures predictable, efficient fermentation while minimizing spoilage risks. Different yeast strains produce different aroma profiles; winemakers select strains matching their stylistic goals. Inoculated fermentation is the norm in commercial winemaking; natural winemakers often avoid it in favour of native-yeast fermentations.
WHY IT MATTERS FOR COLLECTORS
Yeast selection is a key winemaking decision affecting final wine character. Understanding yeast choices helps predict wine style and quality consistency.
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