After the grape harvest comes into the winery in the fall and gets processed from grape clusters to must and juice, the most critical part of winemaking is next: Fermentation. This is when wine acquires the flavors and aromas that make it the wine it will be. The grapes, the winery and even the people coming in to do the work, have yeast they have acquired and which is present at all times, since yeast is everywhere. This is what we call "wild", "native" or "indigenous" yea