Fermaid K Yeast Nutrient for Wine, Mead, Cider, and Fruit Fermentation Fermaid K is a complex yeast nutrient used when wine, mead, cider, or fruit must needs more fermentation support than the base ingredients provide. Scott Labs describes Fermaid K as a YAN source for low-YAN fermentations that supplies a blend of organic nitrogen from amino acids and inorganic nitrogen from ammonia. Use Fermaid K when your nutrient plan calls for a complete nutrient that includes both DAP and yeast-derived nutrition. It is especially useful when honey, fruit, juice, or must does not provide enough yeast-assimilable nitrogen on its own. How much Fermaid K should I use? Scott Labs lists Fermaid K at 25-50 g/hL, or about 2-4 lb per 1,000 gallons. At 25 g/hL, Scott Labs lists a measurable YAN contribution of about 25 ppm. For homebrew-scale wine, cider, and mead batches, follow your recipe, YAN target, or nutrient calculator rather than adding nutrient by habit. During active fermentation, suspend Fermaid K in water, juice, or must and add slowly to avoid rapid CO2 release and foaming. When to add Fermaid K Scott Labs lists Fermaid K as best used around 1/3 sugar depletion when YAN needs cannot be met with Fermaid O or STIMULA nutrients. For staggered mead nutrient schedules, follow the schedule built for your original gravity, yeast strain, and target fermentation profile. Best uses Wine, cider, fruit wine, and mead with low starting YAN Fermentations that need both DAP and complex yeast nutrition Staggered nutrient plans where Fermaid K is specifically called for Related fermentation nutrients For DAP-free organic nitrogen, see Fermaid O. For yeast rehydration, use Go-Ferm Protect. For inorganic nitrogen only, see diammonium phosphate (DAP). You can also browse all yeast nutrients and enhancers. Storage Store Fermaid K sealed in a cool, dry place. Keep the package tightly closed after opening and follow the dated expiration.
