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Wyeast 4946 Bold Red Wine High Alcohol Yeast

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Wyeast 4946 Bold Red Wine High Alcohol Yeast

SKU: Y4946

Wyeast 4946 is ideal on the production of zinfandel, pinot noir and syrah.

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We strongly recommend ordering dry yeast in the summer months. We do include complimentary ice packs with all liquid yeasts. It is difficult to guarantee that the ice packs will survive the trip given transit times and particularly hot temperatures.



Formally knows as Wyeast 4946 Zinfandel, this yeast strain has dominating, strong fermentation characteristics. Alcohol tolerant to 18% (v/v). Ideal for Zinfandel, Pinot Noir, Syrah, or any high sugar must. Good choice for restarting stuck fermentations.
Details & Instructions

Additional Information

Ideal Temperature Range (°F) 60-85°F
Attenuation (%) NA
Flocculation Low-Medium
Alcohol Tolerance (%) 18%
Rate of Fermentation Moderate
Foam Production Very Low
Nutrient Requirements Normal
H2S Production Low
SO2 Production Low
Profile Wine

5.0 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
I used it to make 5 gallons of home grown peach wine. I know...it's red wine yeast...but. After only 10 days, not 3 weeks the yeast was exhausted. I measured SG and did the calculation...alcohol 15.5% ! I highly recommend... worth the $.
September 19, 2018
12 months ago
I used Wyeasy 4946 to get a “stuck” mixture get movin again. Its working overtime and it looks like I’m getting 6 gallons of wine instead of compost fodder. Thank you MIDWEST!!!
September 30, 2017
1 year ago
Excellent results on high brix grapes
With a late harvest from my zinfandel vineyard in Sonoma, I had sugar levels that were a concern, 26.25 Brix. This yeast worked well and the flavor profile was excellent
September 27, 2017
over 3 years ago
Customer Q&A
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does this packet have all of the yeast nutrients and additives to ferment 6.5 gallons?
A shopper on Dec 12, 2017
BEST ANSWER: This packet is designed to inoculate 6 gallons of must. It does contain an activator, but this does not replace yeast nutrients.

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