Mangrove Jack's SN9 - High Alcohol Wine Yeast

Mangrove Jack's SN9 High Alcohol Wine Yeast

Mangrove Jack's SN9 is a robust, neutral wine yeast for high-alcohol and difficult fermentations.

Its high alcohol tolerance makes it useful for stronger country wines, fortified-style wines and other ferments where reliability is more important than a strongly aromatic yeast profile.

Yeast Details

• Fermentation Temperature: 14–28°C
• Alcohol Tolerance: Up to 18% ABV
• Character: Neutral and robust
• Good For: High-alcohol wine, strong country wine, fortified-style wine and perry

How to Use

Sprinkle directly onto the prepared must. High-strength fermentation places greater stress on yeast, so use appropriate nutrient and follow the recipe's sugar-feeding schedule where applicable.

Substitute Yeasts

Mangrove Jack's CL23 is another neutral, robust 18% strain. Lalvin K1-V1116 is similarly resilient but can contribute more aromatic ester character.

Winemaker's Tip

An 18% tolerance is a capability, not a guaranteed final ABV. Sugar concentration, nutrients, temperature, pH and yeast health all affect where fermentation finishes.