Wyeast 2124 Bohemian Lager

Brew authentic German and Bohemian lagers with Wyeast 2124 Bohemian Lager, a Carlsberg-type liquid lager yeast and the most widely used lager strain in the world. This versatile strain produces a distinct malty profile with some ester character and a clean, crisp finish—the hallmark of traditional lager brewing. Each Wyeast Activator™ pack contains approximately 100 billion cells, enough healthy yeast to ferment a standard 5-gallon batch under appropriate conditions. Wyeast 2124 is ideal for Munich Helles, German Pils, Czech Premium Pale Lager, Märzen, Vienna Lager, Munich Dunkel, Schwarzbier, Doppelbock, and Baltic Porter—and is considered an ideal choice for brewing Cold IPAs.

Wyeast 2124 delivers a rounded, malt-forward character with a crisp finish that lets classic lager ingredients take center stage. With low-to-medium flocculation, it stays in suspension long enough for complete, even fermentation and clarifies well with proper cold conditioning. Its clean, dependable profile makes it a true workhorse across the full range of pale and dark lager styles.

This liquid lager yeast features low-to-medium flocculation, 73–77% apparent attenuation, and an alcohol tolerance of approximately 9% ABV. It ferments across a range of 45–68°F (7–20°C): hold 45–55°F (8–12°C) for clean lagers and Pilsners, or ferment warm at 65–68°F (18–20°C) for Common beer styles like California Common. Each pack is packaged with approximately 100 billion cells for reliable, consistent performance.

For best results, store refrigerated between 33–38°F and do not freeze. Pitch cold into well-oxygenated wort and ferment within the recommended range. A thorough diacetyl rest is recommended once fermentation is complete, followed by several weeks of cold lagering for optimal clarity and smoothness. One Activator™ pack suits most standard-strength 5-gallon batches; use a yeast starter for higher-gravity lagers, older packs, or whenever additional cell count is desired.

Trusted by homebrewers and professional brewers alike, Wyeast 2124 Bohemian Lager delivers dependable fermentation, crisp drinkability, and the authentic malt-forward character expected in world-class lagers. Its proven pedigree, healthy cell count, and remarkable versatility make it an outstanding choice for everything from Munich Helles to Baltic Porter—and a standout base for Cold IPA.