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
16–24°CTemp Range
14%ABV Tolerance
🔬 SpeciesSaccharomyces cerevisiae
⏱️ Fermentation SpeedMedium
🎯 Recommended ForSauvignon Blanc, Semillon, Riesling, dessert wine. Nitrogen requirement: Low. Highly aromatic — intense fragrant fruity/spicy esters. Not suitable above 14% ABV. Killer factor: Positive.
🍑 Ester ProfileHigh - Intense fragrant fruity/spicy esters; moderate glycerol adds body/mouthfeel
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💧 RehydrationNone required, add direct to must and stir well.