So how much difference does your choice of yeast make on your finished wine? Well, that's a source of much debate but when choosing a yeast strain to ferment your wine, it is important to match the the yeast to grape varietal. There's also the option of letting the yeasts that are native to the vineyard and winery do the work for you. Crushpad winemaker, Kian Tavakoli digs into the yeast debate.