Amalgamation I Brettanomyces Blend | White Labs WLP4637
White Labs WLP4637 Amalgamation I for Fruit-Forward Brettanomyces Complexity
White Labs WLP4637 Amalgamation I is a Brettanomyces blend built for brewers who want layered wild character, strong attenuation, and a fermentation profile that evolves with time. White Labs describes it as a blend of six Brettanomyces isolates that can produce a dry beer with complex fruit-forward character, berry and citrus notes, and some funk.
This blend is listed at 85% to 95% attenuation, low flocculation, a fermentation range of 70 to 80°F, and high alcohol tolerance. It is well suited to mixed fermentation projects, Brett-forward saisons, farmhouse ales, wild ales, and other specialty beer where evolving complexity is part of the intended result.
What White Labs WLP4637 Contributes to Beer
- Fruit-forward Brett expression: Berry and citrus notes layered with funk instead of one-dimensional wild character
- Very high attenuation: Helps drive beer dry and encourages extended character development
- Good mixed-culture utility: Useful in primary fermentation, secondary development, or longer-term specialty projects
- Strong farmhouse and wild-beer fit: Best for recipes that benefit from time and evolving complexity
White Labs WLP4637 Specifications
- Attenuation: 85% to 95%
- Flocculation: Low
- Alcohol tolerance: High
- Fermentation temperature: 70 to 80°F (21 to 27°C)
Best Uses for WLP4637 Amalgamation I
- Mixed fermentation ales
- Farmhouse ales
- Brett saisons
- Wild specialty beers
- Experimental fermentations where fruit, funk, and dryness are welcome
Why Brewers Choose Amalgamation I
This blend is a strong option when you want Brett character with more fruit complexity and a less blunt expression than a single-strain wild fermentation can sometimes give. It is especially useful for brewers who want a beer to continue developing in the cellar rather than peak immediately.
Because Brettanomyces fermentation can evolve significantly over time, this blend is best used intentionally in recipes and packaging plans that account for continued development.
Liquid Culture Storage and Shipping
We store liquid cultures in temperature-monitored refrigeration to help preserve health and viability until shipment. Once in transit, weather and carrier handling are outside our control, so liquid culture customers should choose shipping protection based on route, season, and transit time.
Expedited shipping, insulated packaging, and ice packs can help reduce risk for liquid cultures during warm-weather transit. Dry yeast is generally much less risky to ship than liquid cultures and liquid yeast.
Related Yeast and Brewing Resources
Browse our full range of White Labs strains for more Brett, wild, and clean fermentation options. You can also review our yeast shipping best practices page before ordering liquid cultures in warm weather.
If you want a Brett blend with strong attenuation, fruit-forward funk, and real aging potential, White Labs WLP4637 Amalgamation I is a strong specialty choice.