• High performance & versatile
  • Prevents the formation of H2S
  • Produces aromas of tropical fruit esters
  • Maintains the natural acidity in juice
  • Suitable for bottle conditioning

Viability / Living cells: > 1.0 x 1010 cells/gram

Package Sizes: 500 g and 10 kg vacuum packed foil sachets.
Storage Conditions:
Store cool and dry, 4 – 15 ⁰C (39 – 59 ⁰F). Do not freeze!
Inoculation Rate:
200 – 350 g/1000 L (1.7 – 2.92 lbs /1000 gallons)

Note: inoculation range is based on the juice sugar content and condition of grapes.

  1. In an inert and sterile container, prepare chlorine-free water at 38-42 ⁰C (100-108 ⁰F) that is 10 times the weight of the yeast to be rehydrated.
  2. Gently mix the yeast into the water and allow 20 minutes for rehydration.
  3. After rehydration, begin to slowly add full strength juice into the yeast mixture every 5 minutes to allow for acclimation. Do not decrease the temperature of the mixture by more that 5 ⁰C (9 ⁰F) with each juice addition.
  4. When the temperature of the yeast suspension is less than 10 ⁰C (18 ⁰F) warmer than the must to be inoculated , slowly add the yeast mixture into the fermentation vessel.

Note: Directly adding dry yeast to the must or juice tank is not advisable. The inoculation rate and the use of SO2, yeast hulls, rehydration nutrients, lysozyme should be decided according to the judgment of the winemaker.

Ossia is a very versatile strain and is recommended for use in white, red, and fruit wines and cider. Ossia’s aroma profile and its ability to arrest fermentation by lowering the temperature also make it a good choice for off-dry styles of wine.

Recommended Styles:

  • White Wine
  • Red Wine
  • Fruit Wine
  • Cider

Specification Sheet_Ossia (June 14, 2023)

Technical Data Sheet_Ossia (May 17, 2024)



Optimal Temperature

18 – 32°C

Cold Tolerance


Alcohol Tolerance



0.20 - 0.35 g/L

Conversion Factor

16.5 g/L


6 - 8 g/L

Volatile Acidity


Nitrogen Requirements


Killer Factor



med - high

Foam Production


SO2 Production

none to very little

H2S Production