Omega Yeast OYL-101 Pilsner I

Clean, crisp, and built for classic Czech-style lagers. OYL-101 is thought to be the “H” strain from a famed Plzeň brewery. Expect a dry, neutral profile with gentle malt, a light floral note, and the typical touch of sulphur that clears during lagering. Do a proper diacetyl rest for best results.

Why brewers pick it

• Classic Czech pils profile that lets Saaz and soft malt shine

• Reliable lager performance with medium-high flocculation and 72–76% attenuation

• Ideal for bright, brilliantly clear golden lagers

Specs

• Strain type: Lager

• Attenuation: 72–76%

• Flocculation: Medium-High

• Temp range: 48–56°F (9–13°C)

• Alcohol tolerance: ~9% ABV

Great for

Czech Pilsner, German Pils, Helles, American light lager

Comparable strains

Wyeast 2001, White Labs WLP800

Brewer’s tips

• Primary at 48–52°F for a clean profile

• Raise to 60–65°F for 24–48 hours near the end of fermentation for a diacetyl rest, then lager cold until crisp and bright

• Oxygenate well and use nutrient for healthy lager ferments