Beer Yeasts

Source: Isolated from wild yeast starter jar in Arlington, VA using Bootleg Biology’s Capture Method #1. ARL - Southern Lager is Bootleg Biology's flagship Local Yeast Project™ strain. The very first culture added to their bank, and a WILD-sourced Lager strain. This culture ferments extremely...

Source: Isolated yeast from a Hornindal mixed culture The perfect yeast for homebrewers with no temperature control! Use AURORA for worry-free fermentations. Just pitch it and ditch it! AURORA creates pleasant orange and citrus esters that perfectly complement beers like IPAs made with fruit-forward...

Availability: Limited, Bootleg BETA. This is potentially a one-time only release based on response. Source: A unique blend of Belgian ale yeast, Brett and Lactic Acid Bacteria (LAB) It’s not farmhouse if it’s not funky! This blend delivers a unique mix of funk, bright...

Source: A unique blend of cultures designed to recreate traditionally made Berliners. We’re big fans of traditionally-made, mixed culture Berliners. That’s why our Berliner Blend is designed to make tart, funky, and flavorful Berliners using traditional Brettanomyces and Lactobacillus Berliner cultures. To make a...

Source: Isolated from Chardonnay grapes harvested from Kamiak Vineyards/Gordon Estate Winery in Pasco, WA using Bootleg Biology’s Capture Method #2. Chardonnay is a clean fermenter but produces mild phenolics and a touch of citrusy & banana aroma at normal ale temperatures. For Beer: Excellent for a unique...

Source:  English brewery known for pub-style ales Classic English produces soft, juicy, and tropical fruit flavors when fermenting beers made with citrusy hops. This culture has become the de facto standard for making hazy New England-style IPAs in addition to the Classic New England...

Source:  Vermont brewery famous for creating the New England IPA style. Famously referred to as "Conan"� by brewers, this yeast helped launch an entirely new type of IPA. Classic New England creates distinctive peach and tropical notes along with a touch of malt nuttiness....

Who doesn't love a malty, slightly hoppy traditional Czech lager? CUL was sourced from an unpasteurized Czech Lager beer that produces a unique bite with low diacetyl and short primary fermentation. Please note: It is highly recommended that a cold pack be purchased when ordering...

Source:  Original blend of yeast isolated from Norwegian kveik. Now with MODEN! The perfect culture for producing juicy New England-style IPAs and Pale Ales, but in a few days! Bootleg dropped in a dose of MODEN into their original BETA Double NEEPAH, and the...

FerMENTORS Black Project Spontaneous Ales Culture Availability: Core culture. Available with every homebrew culture presale release (3 times per year) Source: A unique blend of wild yeast and lbactic acid acteria (LAB) curated by Black Project Spontaneous Ales in Denver, CO, USA Black Project...

FerMENTORS Embrace The Funk Culture Availability: Core culture. Available with every homebrew culture presale release (3 times per year) Source: A unique blend of ale yeast, Brett and restrained LAB curated by Embrace The Funk – Yazoo Brewing in Nashville, TN, USA Embrace The...

FerMENTORS Jester King Brewery Culture Availability: Core culture. Available with every homebrew culture presale release (3 times per year) Source: A unique blend of ale yeast, Brett and lactic acid bacteria (LAB) curated by Jester King Brewery in Austin, TX, USA Jester King is...

FerMENTORS The Rare Barrel Culture Availability: Core culture. Available with every homebrew culture presale release (3 times per year) Source: A unique blend of ale yeast, Brett and lactic acid bacteria (LAB) curated by The Rare Barrel in Berkeley, CA, USA The Rare Barrel...

Surreptitiously sourced during a keller lager event at Carnivale Brett in 2019, this tantalizing lager culture has never before been released commercially. A subtly rich and malty backbone balances out the surprisingly crisp finish in any traditional German lager style, or honor the source brewery...

Source: West Flanders, Belgium brewery specializing in funky, sour, mixed-fermentation beers. This rare, and commercially unavailable yeast isolate, produces pungent horse blanket and fresh leather aromas. Perfect for breaking out the funk in farmhouse-style beers. Funk Weapon #1 is featured in the Trinity &...

Source: Family-owned brewery producing Gueuze in West Flanders, Belgium. This rare, and commercially unavailable yeast isolate is perfect for 100% Brettanomyces fermentations, especially Brett IPAs. Amplifies citrus and tropical fruit-forward hop flavors and aromas into a punchy ripeness. With extended time under CO2 pressure,...

Source: Dry-hopped, Unblended Lambic Produced by a Traditional Lambic Brewery in Brussels, Belgium. Funk Weapon #3 is a versatile culture that creates wildly different flavor and aroma profiles depending on the age of fermentation. Young fermentations produce mild musty funk and ripe tropical fruit,...

Source: A unique blend of cultures curated by The Mad Fermentationist, Michael Tonsmeire Bootleg Biology is proud to announce The First Official Mad Fermentationist Culture Fine tuned over two years, this blend morphed over time to become an elegant powerhouse of classic Saison spice, stone-fruit Brett,...

Source: Classic Cologne Brewery   Mustange Kolsch delivers a truly authentic-tasting Kölsch bier the way centuries of Cologne brewers intended. Top fermenting at the cooler end of Ale temperatures with a period of lagering allows you to serve a clean-tasting, bright beer that looks...

Source: A unique blend of Saccharomyces cerevisiae cultures The NEEPAH IPA Blend is Bootleg Biology's secret weapon for delivering the juiciest, tropical fruit bomb you’ve ever made. Carefully cultivated from a special blend of fruit-forward yeast strains, the NEEPAH Blend is here to amplify...

Source: A traditional Belgian Oud Bruin producer. OB is a rare treat. Never previously commercially available, this is the pure, clean yeast culture used to primary ferment a highly regarded traditional Belgian Oud Bruin. This culture does not contain Brett or Lactic Acid Bacteria....

Source:  Isolated yeast discovered in bottle dregs from our friends Eik & Tid (Oslo, Norway) OSLO is a modern take on traditional Norwegian farmhouse brewing cultures. OSLO can comfortably produce beautifully clean, lager-like beers at temperatures as high as 98F (37C) without noticeable off...

Source:  Unique blend of traditional and modern lager cultures REGAL Lager Yeast Blend is a first fast fermenting, general purpose lager yeast blend – crispy enough to make authentic pilsners and full flavored enough to make mind blowing bocks, dunkels and schwarzbiers. Finally, it’s...

Source: A unique blend of previously unavailable commercially used Saison cultures. Saison Parfait is Bootleg Biology's New World Saison Blend, a new take on the modern saison yeast flavor and aroma profile. Saison Parfait pairs classic pepper & spice saison phenolics with prominent juicy...

Availability: Seasonal Source: A "living” culture blend propagated from Bootleg Biology's carefully managed continuous solera fermentation. Many lab-produced multi-species culture blends fail to reproduce the richness and complexity of traditional lambic-style fermentations in their first effort. This can be a result of artificially slamming...

Availability: Limited Source: Traditional Norwegian Kveik breweries. The new De Lacto Standard! Our first official Lactobacillus culture, and it’s a beast. We’ve tested countless LAB cultures over the years, and this blend of Lactobacillus plantarum is the most brutally effective Lactic Acid producer we’ve found! If...

(Pediococcus pentosaceus Blend) Source: Cultured from Malted Barley starter and Nashville-area flowers. Bootleg Biology is excited to release their first 100% Lactic Acid Bacteria souring blend. They chose this specific blend because of its ability to sour quickly and cleanly at a range of...

Some of our customers request that we ice liquid yeast for shipping. While it isn't necessary to achieve a good ferment, the yeast will be in better health when it arrives at your door. While you can still achieve a good ferment without paying...

The best of both worlds, House is clean and allows malt and hops to shine. This strain is extremely versatile and flocculent enough to drop out of the beer quickly. Best used in American IPAs but works well in English style ales. House is...

Ready to attack your IPA, Barbarian produces stone fruit esters that work great when paired with citrus hops. Barbarian will give you what you need for an exceptionally balanced IPA. Comparisons:NA Assumed Origin: The Alchemist Temp: 62-70F, 16-21C Flocculation: Medium Attenuation: 73-74%