OSLO™ Kveik Yeast - Bootleg Biology

OSLO™ Kveik Yeast - Bootleg Biology

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OSLO Kveik yeast is a modern take on traditional Norwegian farmhouse brewing cultures. Originally isolated from bottle dregs by Bootleg Biology's friends Eik & Tid in Oslo, Norway. OSLO can comfortably produce beautifully clean, lager-like beers at temperatures as high as 98°F without noticeable off flavors. At the high end of its fermentation temp range, beers can finish attenuating in as little as three days! This culture’s versatility and neutral flavor profile allows you to effortlessly produce most beer styles.

Bootleg is the first yeast lab to release this unique Kveik-family culture sourced from a raw beer.

Brewing Info:

  • Type: Bottom fermenter. Saccharomyces bayanus / pastorianus / uvarum monoculture
  • Pitching Rate: Directly pitchable into 5 gallons of 1.050 or lower wort
  • Estimated Attenuation: 76–86%; attenuation will increase with higher fermentation temps or with successive repitches
  • Estimated Final pH: 4.3–4.6
  • Flavor/Aroma Profile: Clean, lager-like flavor profile, with no expected off flavors or phenols at high temperatures
  • Flocculation: Medium
  • Recommended Fermentation Temperature: 75–98°F; colder temperatures may result in higher final gravities or early flocculation/stalling. Pitch and Ferment at 85°F or higher for the quickest fermentation time.


Please Note: For best results we Always recommend ordering an Ice Pack with your liquid yeast. Ice Packs can be found below in the "You might Also Need" section.


Item # Y612
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.19 LBS
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Brewing seltzer and wanted a clean taste & champagne yeast is too slow
Chris F on Dec 7, 2021
Brewing seltzer and wanted a clean taste & champagne yeast is too slow
Chris F on Dec 7, 2021

5.0 / 5.0
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Rated 5 out of 5
Great yeast for hot summer brewing
The Oslo kveik is perfect for summer brewing in hot climate. I've brewed different ales with it and would rather use this than trying to cool wort down to traditional yeast fermentation temperatures. It ferments fast at 90-95F and doesn't seem to add any unwanted flavors to the beer.
May 31, 2021
8 months ago