Lallemand Sourvisiae® Sour Ale Yeast – 10g Sachet

Ideal Yeast for Sour Beer Production

Sourvisiae® is a bioengineered ale yeast strain (Saccharomyces cerevisiae) capable of producing lactic acid during fermentation, providing brewers with an easy, reproducible, and mono-culture product for sour-style beer production. This strain allows brewers to ferment and sour the beer in one simple step, reducing cross-contamination risks, lowering costs, and cutting total process time. 

This 10g sachet is designed to ferment up to 6 gallons (23 liters) of wort, making it ideal for homebrewers.

Key Characteristics:

• Attenuation: 76% – 82%
• Flocculation: High
• Alcohol Tolerance: Up to 12% ABV
• Fermentation Temperature Range: 15°C – 22°C (59°F – 72°F)
• Aroma and Flavor Profile: Tangy, sour, slightly fruity

Perfect for Brewing:

• Berliner Weisse
• Gose
• American Wild Ales

Usage Instructions:

• Pitching Rate: 50 – 100 g/hL to achieve a minimum of 2.5 – 5 million viable cells per milliliter
• Rehydration: Rehydrate by sprinkling the yeast on the surface of 10 times its weight in clean, sterilized water at 25°C – 30°C (77°F – 86°F). Leave undisturbed for 15 minutes, then stir to suspend completely. Adjust the temperature to that of the wort and inoculate without delay.

Storage:

• Store in a vacuum-sealed package in dry conditions below 4°C (39°F).
• Opened packs must be re-sealed, stored in dry conditions below 4°C (39°F), and used within 3 days.
• Do not use yeast after the expiry date printed on the pack.

Enhance Your Brewing Process

Pair LalBrew® Sourvisiae® 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 (Yes, even Dry yeasts). 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 Dry yeast shipments, we offer ice packs and insulated envelopes as an optional add-on for customers looking for extra protection during hotter months. 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 Lallemand yeast strains, check out our entire collection of Lallemand yeasts here.

Craft consistent and reproducible sour ales with Sourvisiae®, streamlining your brewing process by fermenting and souring in a single step.