Saccharomyces cerevisiae — the 'only strain' for Germanic aromatic white wines. AW4 is noted for developing powerfully fragrant, full-spice aromatic wines and is a perfect match for Gewürztraminer, and also recommended for Sauvignon and Semillon where a positive aromatic ester contribution from the yeast is wanted.
AW4 is a good fermenter across the range 14–30°C (57–86°F), with low foam formation and medium-to-high glycerol production. It will ferment up to 14.5% ABV provided the temperature is held within 20–25°C (68–77°F) and the pH is above 3.0.
Browse the full Mangrove Jack's wine yeast range to compare strains.
Yeast Specification
| Species | Saccharomyces cerevisiae |
|---|---|
| ABV Tolerance | 14% |
| Temp Range | 16–24°C |
| Fermentation Speed | Medium |
| Recommended For | Sauvignon Blanc, Semillon, Riesling, dessert wine. Nitrogen requirement: Low. Highly aromatic — intense fragrant fruity/spicy esters. Not suitable above 14% ABV. Killer factor: Positive. |
| Ester Profile | High - Intense fragrant fruity/spicy esters; moderate glycerol adds body/mouthfeel |
Rehydration / Usage: None required, add direct to must and stir well.