Gervin GV4 - High Alcohol Wine Yeast (Dessert, Port)

Gervin GV4 High Alcohol Wine Yeast

Gervin GV4 is a robust wine yeast for strong, dessert and port-style wines where high alcohol tolerance is required.

It is a fast, low-foaming strain suited to demanding fermentations, provided the must has suitable nutrition and fermentation conditions.

Yeast Details

• Pack Size: 5g
• Batch Size: Up to 23 litres
• Fermentation Temperature: 15–25°C
• Alcohol Tolerance: Up to approximately 21% ABV under suitable conditions
• Character: Fast fermenting and low foaming
• Good For: Strong wine, dessert wine and port-style fruit wines

How to Use

Sprinkle directly onto the prepared must. High-strength fermentation places greater stress on yeast, so good nutrition and steady temperature control are particularly important.

Substitute Yeasts

Mangrove Jack's SN9 is a neutral, robust alternative with an 18% alcohol tolerance. Lalvin K1-V1116 is another resilient 18% strain with greater aromatic potential.

Winemaker's Tip

The stated alcohol tolerance is a maximum capability rather than a guaranteed finishing strength. Sugar concentration, nutrient availability, pH, temperature and yeast health all affect the final result.