Pediococcus damnosus | White Labs WLP661 Yeast
White Labs WLP661 Pediococcus damnosus: Traditional Lactic Acid Bacteria for Sour Beer Production
Create Complex Sour Beers with This Classic LAB Culture
White Labs WLP661 Pediococcus damnosus is a lactic acid-producing bacteria used in mixed fermentation and spontaneous-style beers. Known for its ability to generate high levels of lactic acid over extended aging periods, this strain is commonly paired with Brettanomyces to create the nuanced sourness found in Lambics, Flanders Reds, and American Wild Ales. Unlike Lactobacillus, Pediococcus can continue producing acid post-fermentation, making it ideal for barrel-aged and bottle-conditioned sour beers.
Key Characteristics:
- Acid Production: High lactic acid development over time
- Alcohol Tolerance: Moderate (up to ~10%)
- Fermentation Temperature Range: 70°F – 85°F (21°C – 29°C)
- Flocculation: Low
- Compatibility: Best used with Brettanomyces for full flavor development
Ideal for Brewing:
- Lambic
- Gueuze
- Flanders Red Ale
- American Wild Ale
- Mixed Fermentation Projects
Why Choose WLP661 Pediococcus damnosus?
- Traditional Sour Culture: Used in classic European-style mixed fermentations.
- Long-Term Aging: Produces lactic acidity over months, developing deep sour complexity.
- Best with Brett: Ideal when paired with Brettanomyces to counteract diacetyl production and create a balanced profile.
Enhance Your Fermentation Process
To build complexity, combine WLP661 with White Labs Brett blends. For fermentation support, add White Labs Zinc Buddy to maintain yeast health during extended fermentation.
Our Commitment to Yeast and Bacteria Health
At SoCal Brewing Supply, WLP661 is stored under strict temperature control and monitored 24/7 to ensure maximum viability. If you're shipping this product, we strongly recommend adding an ice pack and insulated mailer to protect the culture during transit. Melted ice packs are normal upon arrival and help buffer heat exposure.
Browse more from our White Labs yeast and bacteria collection to explore specialty strains for every fermentation goal.
Use WLP661 to bring depth, funk, and authentic lactic character to your next sour beer creation.