GY021 Kolsch Bier Yeast - GigaYeast

GY021 Kolsch Bier Yeast - GigaYeast

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With 200 Billion Yeast Cells per pack, the Giga Yeast Gold Pitch features nearly double the cell count of other liquid yeast producers. This equals faster starts, better flavors, and more insurance that your beer is going to turn out well. Double the yeast for just a little more money.  Smart brewing.

The Kolsch Bier Strain
From one of the oldest Kölsch breweries in Köln.  Fermenting under 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 produces a moderate amount of sulfide that will dissipate completely.

More On Cell Count
200 Billion cells per pouch means that with one pounch you can attain the gold standard of pitch count. The ideal pitch rate is .75 million yeast cells for every milliter of wort  times degrees plato for nearly any beer you will make. 200 billion yeast cells is also fantastic if you are making 5 gallons of high gravity beer and don't have time to make a starter.  Saves money if you are making 10 gallons and only want to buy one yeast. Getting twice as many cells per pack versus the other brands is also a great idea for mail order shipment, which can be a little tough on liquid yeast.


Attenuation Medium Gravity*:  79% – 83%
Attenuation High Gravity*: 76% – 79%  (9.6% – 10.1% ABV)
Temperature Range†:  60˚F – 72˚F
Flocculation:  Medium/High

Style Uses:

  • Kolsch
  • Alt
  • Cream Ale
  • Pale Ale
  • India Pale Ale
  • Amber

* Attenuation was measured after 8 days with Ale yeast at 70˚F and Lager yeast at 50˚F.  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).


For best results we always recommend ordering an ice pack with your liquid yeast.

Item # GY021
Shipping Eligible for Free Shipping Program
Availability California - Out Of Stock
Pennsylvania - In Stock
Weight 0.35 LBS
Community Q&A

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Browse 1 question Browse 1 question and 16 answers
Why did you choose this?
MoreFlavor Store
Recipe need
Gary K on Apr 22, 2021
Had good luck before
Phillip D on Dec 30, 2020
Recipe need
Gary K on Apr 22, 2021
Great results
Robert S on Feb 23, 2021
Had good luck before
Phillip D on Dec 30, 2020
Dennis S on Jun 26, 2020
Recommended for the kit
Steve G on May 14, 2020
Previous use led to successful beer.
Valued C on Aug 28, 2019
good value, it's a double pitch
STEVE F on Aug 28, 2019
Have not used this brand before. Wanted to see how good it is.
Michael G. G on Jun 26, 2019
Love this yeast.
Michael P on Jun 3, 2019
Came recommended
shawn r on May 14, 2019
random pick of the 4 options
John E on May 13, 2019
works well.
Michael P on Jan 8, 2019
200B vs 100B no brainer
David Ayers on Jun 26, 2018
Works well
Michael P on Mar 27, 2018
Wanted to try Giga Yeast
Mr. S on Mar 27, 2018
Double count, save some money
Michael P on Mar 6, 2018
Great results
Robert S on Feb 23, 2021
Dennis S on Jun 26, 2020

5.0 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Pitch at 95F I dare you!
Hot summer day and you want to brew? Go head and brew and use this yeast and get no off flavors. If you can, let it cellar for 5 weeks and you'll get a clear beer.
March 3, 2021
1 year ago
Rated 5 out of 5
I brewed up a 10 gallon batch of kolsch and split into 4 X 2.5 gallon fermentors where I pitched US-05, WLP029, Wyeast #2565, and this one. This strain was the best by far. Please be aware that this was a slow starter, but it finished very clean.

I plan to use this unless I find something better for all my future Kolschs.
August 5, 2018
over 3 years ago
Rated 5 out of 5
First time using Giga Yeast but it was easily the clearest I've pulled from the fermentor. If their other strains are like this, they will become my favorite producer.
7 days after primary fermentation.  Easily the clearest beer I've pulled.
7 days after primary fermentation. Easily the clearest beer I've pulled.
March 10, 2018
over 3 years ago