Vintners Harvest Wine Yeast - VR21 - Fruit varietal and country red wines
Imake are changing the name of Vintners Harvest to Mangroves Jacks yeast
Saccharomyces Cerevisiae – Exceptional yeast strain for full fruit varietal and country red wines promoting good structure, balance and colour.
The majority of yeast strains strip out fruit flavour and colour from the must, not so with intners Harvest Wine Yeast VR21 which is particularly noted for preserving and retaining the natural fruit characteristics of the grape / country fruit and enhancing palate length.
VR21 wine yeast is a relatively neutral strain producing subtle levels of aroma and flavour compounds, allowing full expression of varietal / country characteristics whilst enhancing colour, wine structure and balance.
VR21 wine yeast is an ethanol tolerant killer yeast strain, capable of fermenting to 15% abv. ethanol. Good production of glycerol, low volatile acid production, zero sulphur dioxide formation and low foaming.
Do not re-hydrate Vintner’s Harvest yeast before addition, but add directly to the must/juice noting the following:
To avoid extended lag time and risk of bacterial contamination ensure must/juice temperature is above 20degC (68degF) for the start of fermentation and for at least the first 24 hours.
Control fermentation temperature within the range specified for each strain. As a general rule ferment between 20 - 24degC (68-75degF) unless cold fermenting is desired for flavour/aroma development.
All yeast strains are sensitive to excessive osmotic pressure, incorrect pH and nutrient insufficiency. Due care and attention to must/juice preparation is important.