Since 1986, the same Wyeast yeast strains that spurred the craft brewing revolution, and defined the meaning of quality and integrity, continue to set the precedent for brewmasters to this day. Our heritage collection of proven premium liquid yeast and cultures creates beers worthy of a legacy: begin your legacy with us.
Professional Brewing Yeast
Yeast management, instructions for use, recommended pitch rates, specifications, and more.
Nearly four decades of expertise in crafting yeast for brewers around the world shows that there’s more to a strain than its name and number. Wyeast yeast is unparalleled in quality and performance, guaranteed.
Purity
A rigorous quality control and quality assurance program utilizes both traditional methods and modern innovations to guarantee culture purity and single morphology down to the threshold of detection. Cultures, ingredients, and equipment are analyzed and held to strict specifications throughout the entire propagation process. Complete QA/QC analysis on every finished product means our strict specifications are always met before your order ships.
Analyses include:
• Plating on general and selective media for detection of viable yeast and bacteria contaminants
• Colony morphology on differential agar
• Cell morphology with phase contrast microscope
• qPCR confirmation of commercial yeast species (S. cerevisiae, S. pastorianus, S. cer. var. diastaticus, and Brettanomyces)
• qPCR screening for the detection of STA1+ yeast, Brettanomyces, and common brewhouse contaminants
Precision Cell Density
Wyeast provides the most precisely packaged yeast slurry to guarantee consistent, reliable fermentations in your brewhouse. No range or minimum – we prepare our products at exactly 1.2 billion viable cells per milliliter with advanced cellometer & validation processes. This results in > 99.9% viability for your target pitch rate – delivering the most accurate cells per mL per Plato calculations for reproducible fermentations.
Proven Pitch Rates
With over 35 years of experience in the brewing industry, our pitch rate recommendations are proven and offer the ideal balance for successful fermentations without over-or-under pitching. Custom packaging options and a low minimum volume on every strain means all brewhouse and fermentation sizes can be accommodated.
Optimal Propagation Conditions
Every strain is initiated from our ultra-low temperature archive in order to maintain genomic stability, ensuring the culture maintains consistent fermentation kinetics, flavor profiles, and flocculation characteristics.
Cultures are propagated using a nutrient-rich, premium malt extract based medium under optimal aeration and temperature parameters for growth and cell health. This process ensures the yeast are always conditioned to an environment similar to brewers wort.
Fresh without Compromise
Wyeast ships directly from our facility in Hood River, Oregon USA to yours, guaranteeing the freshness and integrity of every order. One production facility means consistency and reliability, batch after batch.
The foundation of our business and operations are built to support yours.
The Original Liquid Yeast Collection
Authentically sourced and isolated by our founders, microbiologists, friends, and collaborators from around the world since 1986. Wyeast’s heritage culture collections have been curated for decades to offer commercially proven and reliable strain selection for any fermentation style. A genuine Wyeast strain comes with more than its history – it comes with a legacy of quality & integrity.
Product Warranty Guarantee
We back our products with the guarantee that they will meet or exceed our professional specifications, and will perform as expected under typical brewing conditions when they hit your wort. If not, we will make it right.
Licensed Food Manufacturing Facility
Uncompromising compliance and adherence with food manufacturer regulations by the US Food & Drug Administration and the Oregon Department of Agriculture means every batch is prepared from start to finish under strict protocols and backed by Wyeast’s Product Warranty Guarantee.
Customer Care
Providing comprehensive customer service and technical support are core values of our business. Our representatives, professional brewers, and food science experts are eager to assist with your questions at any phase of your brewing schedule – from strain selection and pitch rate recommendations to fine-tuning your fermentation conditions and troubleshooting any situation that may arise.
Kosher Certified
All Wyeast cultures and supporting fermentation products are certified Kosher by the Orthodox Union.
Featured Beer Strains
Very clean, crisp flavor characteristics with low fruitness and mild ester production. A very versatile yeast for styles that desire dominant malt and hop character. This strain makes a wonderful “House” strain. Mild citrus notes develop with cooler 60-66 °F (15-19 °C) fermentations. Normally requires filtration for bright beers.
Originating from a traditional London brewery, this yeast has a wonderful malt and hop profile. It is a true top cropping strain with a fruity, very light and softly balanced palate. This strain will finish slightly sweet. London Ale III has become synonymous with the production of New England IPAs, also known as a juicy IPA or hazy IPA, and balances well with the tropical fruit qualities from late and dry hop additions.
This Carlsberg type yeast is the most widely used lager strain in the world, and is considered the ideal choice for brewing Cold IPAs. This strain produces a distinct malty profile with some ester character and a crisp finish. A versatile strain, that is great to use with lagers or Pilsners for fermentations in the 45-55°F (8-12°C) range. It may also be used for Common beer production with fermentations at 65-68 °F (18-20 °C). A thorough diacetyl rest is recommended after fermentation is complete.
This strain is a classic, true top cropping yeast strain from a traditional brewery in Cologne, Germany. Beers will exhibit some of the fruity character of an ale, with a clean lager like profile. It produces low or no detectable levels of diacetyl. This yeast may also be used to produce quick-conditioning pseudo-lager beers and ferments well at cold 55-60 °F (13-16 °C) range. This powdery strain results in yeast that remain in suspension post fermentation. It requires filtration or additional settling time to produce bright beers.
Seasonal Release
Limited Release July–September 2025
This strain exhibits a very clean and dry flavor profile often found in aggressively-hopped lagers. Produces mild aromatics and slight sulfur notes typical of classic pilsners. This yeast is a good attenuator resulting in beers with a distinctively crisp finish.
From a famous brewery in Munich, this strain is a low diacetyl and low sulfur aroma producer. An excellent choice for malt-driven lagers.
