WLP029 Kölsch Ale Yeast is a classic German ale strain sourced from Cologne (Köln), prized for producing crisp, clean, lager-like beers while still fermenting as an ale. It is a go-to choice for authentic kölsch and altbier, delivering a refined profile with subtle fruit, gentle hop expression, and a bright, snappy finish when paired with good temperature control and cold conditioning.

Fermentation performance and character are best when WLP029 is held in the mid-to-upper 60s °F. It produces a clean profile when used properly, but it does not ferment well below about 62°F once past peak activity. This makes steady temperature management especially important. While flocculation can be low (often lower after the first generation), extended cold conditioning helps the beer clear and polish into the smooth, delicate character that defines the style.

Highlights

• Clean, crisp, lager-like character in ales
• Enhances hop flavor and bitterness with a refined, delicate finish
• Traditional strain for kölsch and altbier
• Excellent for “hybrid” styles that benefit from ale fermentation with lager-like crispness
• PurePitch® Next Generation packaging for consistent, reliable pitching

Brewing Notes

• Target 65-69°F for the cleanest results. Avoid dropping below ~62°F after peak fermentation, as this strain may stall or slow dramatically.
• For best clarity and classic character, cold crash and cold condition after primary fermentation – kölsch and altbier often benefit from a short lagering period.
• Low flocculation is common, especially beyond the first generation. Time, cold conditioning, and finings can help achieve a bright pour.
• Consider a brief diacetyl rest near the end of fermentation if your process or recipe benefits from it.

Storage and Handling

• Store refrigerated until use.
• Allow the pouch to warm toward fermentation temperature before pitching to reduce temperature shock.
• Maintain a healthy pitch rate and good oxygenation, especially for cooler ale fermentations.

Tech Specs

• Attenuation: 72-78%
• Flocculation: Low
• Alcohol Tolerance: 5-10%
• Fermentation Temp: 65-69°F (18-20°C)
• STA1: Negative
• Popular Styles: Kölsch, Altbier, Cream Ale, California Common