Berkeley Hills Sour Yeast | WLP4663 | Vault Strain

White Labs Berkeley Hills Sour Yeast WLP4663

A Unique Vault Strain for Balanced Sour Ales

White Labs Berkeley Hills Sour Yeast (WLP4663) is a Vault strain designed to produce balanced sour ales with vibrant complexity. This strain offers a blend of Brettanomyces and Lactobacillus, creating a harmonious profile of fruity esters, mild funk, and tart acidity. Ideal for kettle sours, Berliner Weisse, or experimental sour ales, WLP4663 is perfect for brewers seeking to craft sour beers with approachable character and depth.

Key Characteristics

• Strains Included: A blend of Brettanomyces and Lactobacillus strains.
• Flavor Profile: Fruity esters, mild funk, and balanced tartness.
• Applications: Perfect for kettle sours, Berliner Weisse, and other sour ale styles.
• Optimal Temperature Range: 68–72°F (20–22°C).
• Alcohol Tolerance: Medium to high, suitable for a variety of sour beer recipes.

Recommended Usage

White Labs WLP4663 is ideal for primary fermentation or as part of a mixed fermentation. This strain develops its distinct flavor profile over time, with the tartness becoming more pronounced as the beer matures. As a Vault strain, WLP4663 is available for a limited time, offering brewers a rare opportunity to experiment with its unique characteristics.

Enhance Your Brewing Process

Pair WLP4663 with White Labs Brewzyme to eliminate diacetyl and ensure a clean, professional-quality finish. For optimal yeast health, use White Labs Zinc Buddy to promote vigorous and consistent fermentation.

Our Commitment to Yeast Health

At SoCal Brewing Supply, we take yeast storage and viability very seriously. We ensure yeast is always stored under optimal conditions, with 24-hour monitoring of refrigerator temperatures to prevent spikes that could negatively impact yeast health.

For liquid yeast orders, we recommend shipping with an ice pack and insulated envelope to ensure your yeast arrives in top condition. It’s normal for ice packs to melt during transit; their purpose is to protect the yeast from extreme temperatures caused by external weather conditions.

If you like this yeast or want to view other White Labs yeast strains, check out our entire selection of White Labs Yeasts here.

White Labs Berkeley Hills Sour Yeast WLP4663 is the key to crafting balanced sour ales with complexity and character. Take advantage of this limited-release Vault strain while supplies last.