Made In the San Francisco Bay Area
GigaYeast, Inc.

Golden Gate Lager Yeast GY005

Attenuation Medium Gravity*                        79% – 83%

Attenuation High Gravity*                              57% – 60% (7.5% – 8.1% ABV)

Temperature Range:                                   55˚F – 70˚F

Flocculation:                                                  Medium


Lager yeast used to create the California Common beer style.  Ferments unusually high for a lager strain and still retains a lager sensibility (up to 68˚F).  This yeast leaves a slightly sweeter beer than our other lager yeast— perfect for creating a subtle, malty undertone against a clean lager background.  Creates a moderate amount of sulfide under some conditions that will dissipate with a short rest.  Fermentations at traditional lager temperatures may be slow.  Recommended 55˚- 68˚F.


Representative Styles:

California Common

Cream Ale



* Medium Gravity is 14˚ – 16˚Plato.  High Gravity is 23˚- 25˚Plato. 

  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 68˚ – 72˚F and then lower or raise temp as desired.  Lager Yeast are typically fermented at 45˚ – 58˚F.  If desired, Lager Yeast can be given a “hot start” at 65-68˚F and then lowered to the primary temperature after active fermentation begins (10-20hrs). 

GigaYeast laboratory is still gathering data on many of our strains.  Information provided here may change some in the future.  Please call if you need more info.