It performs exceptionally well at temperatures ranging from 65 to 69°F (18-20°C) and does not ferment well below 62°F (17°C) after peak fermentation. Typically has low flocculation characteristics after the first generation.
Kolsch yeast is top-fermenting but at slightly cooler temperatures than most typical ale strains. At around 60°F, most fruity esters typically associated with ales are suppressed. The unique fermentation profile of Kolsch can only be attained by using the right German ale yeast.