Item #: 2008030502 American Hefeweizen Ale Yeast (WLP320) $6.99 WLP320- American Hefeweizen Ale Yeast This yeast is used to produce the Oregon style American Hefeweizen. Unlike WLP300, this yeast produces a very slight amount of the banana and clove notes. It produces some sulfur, but is otherwise a clean fermenting yeast, which does not flocculate well, producing a cloudy beer. Attenuation: 70-75% Flocculation: Low. Optimum Fermentation Temperature: 65-69° F.