Made In the San Francisco Bay Area
GigaYeast, Inc.

Portland Hefe Yeast GY020

Attenuation Medium Gravity*                        76% – 80%

Attenuation High Gravity*                              44% – 47% (5.5% – 6.0% ABV)

Temperature Range:                                   64˚F – 74˚F

Flocculation:                                                  very low



Used to make a famous American Wheat Beer.  Creates a clean tasting crisp brew with just a hint of banana and spice.  Very low flocculation means a hazy beer true to the hefe style.


Recommended Styles:

American Wheat Beer            Weizenbock




*  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˚ – 70˚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.