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Martha Stoumen - How To Make Natural Wine

Beyond Organic Wine

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How to Ferment Grapes in a Fish Tank

Early on in fermentation, non-saccharomyces or vaca species will be the ones that are present. Those provide some of those kind of like more wild, what I think of as interesting flavors. And then after a couple percent of alcohols produced, all of those yeast and bacteria usually die off where the majority of them do and saccharomyces, cervasia, take over. So at this point, and you haven't added any sulfur when you brought the grapes in and put them in the fermenter. No, no. It's just kind of in the air, especially midway through harvest where there's tons just everywhere. You'll notice like the first batch you bring

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