Apex Cultures | Special Sour Beer Yeast (500g)

Special Sour is a natural yeast strain (Lachancea termotholerans) that produces lactic acid while initiating alcoholic fermentation, in a novel, easy-to-reproduce process for any sour-like beer. Special Sour is an indigenous yeast, isolated from Burgundy premium grapes, which produces high concentration of lactic acid, the principal component of sour beers distinctive taste. Fermentation kinetics:


Sour beer styles (e.g., berliner weisse, flanders red, gose, American Lambic style, American Wild Ales, sour).

Fermentation kinetics: slow, requires sequential inoculation after 3 days at 64°F (18°C)

Fermentation temperature range: 61-75°F (16-24°C)

Apparent attenuation: 30%

Flocculation & sedimentation ability: medium

Dosage recommendation: 100-150 g/hL of 12°P - 20°P cold wort