GigaYeast Kölsch Bier GY021 is from one of the oldest Kölsch breweries in Köln. Fermenting under 18˚C ( 65˚F ) produces a very clean, crisp beer with a touch of ester. Perfect for Kölsch or any style where a dry, clean profile is desired. GY021 Kölsch Bier GigaYeast produces a moderate amount of sulphide that will dissipate completely. Ferments cold similar to GY019 Kölsch Bier GigaYeast to produce crisp tasting lager-like ales.
Attenuation Medium Gravity*
Attenuation High Gravity*
- 76% – 79% (9.6% – 10.1% ABV)
- 15.6˚C – 22˚F (60˚F – 72˚F)
- Pale Ale
- India Pale Ale
- Cream Ale
Medium Gravity is 14˚ – 16˚Plato / 1.057 - 1.065 SG. High Gravity is 23˚- 25˚Plato 1.096 - 1.106. †
The working temperature range represents the range at which fermentation for a given strain produces a typical attenuation- not necessarily the ideal temperature for your particular beer style.
As a rule of thumb, start ale yeast fermentation at 20 - 21˚C (68˚ – 70˚F) and then lower or raise temp as desired. Lager Yeast are typically fermented at 7 - 14˚C (45˚ – 58˚F). If desired, Lager Yeast can be given a “hot start” at 18-20˚F (65-68˚F) and then lowered to the primary temperature after active fermentation begins (10-20 hours). GigaYeast laboratory is still gathering data on many of our strains. Information provided here may change some in the future.