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Old 08-27-2012, 11:29 PM   #1
shortnstout
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Default freezing yeast cultures

What types of yeast, if any, could be stored in the freezer. And how long would they stay good?


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Old 08-27-2012, 11:41 PM   #2
evrose
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1. All of them.

2. Depends. About a year, maybe less, maybe more.


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Old 08-28-2012, 03:51 AM   #3
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Just to be clear, you are talking about glycerine storage right? Just throwing a regular yeast culture in the freezer will not end up with very happy yeast (i.e. they will all die).
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Old 08-28-2012, 03:59 AM   #4
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I have been freezing yeast for about 9 months now and have successfully brewed with 5 different yeasts saved for over 6 months in a couple of cases.

I now have a stock of about 8-9 different yeasts.

I make 4 vials to freeze with each new purchase. If I made 4 new vials each time for 4 generations I could brew 256 batches from the original package!
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Old 08-28-2012, 10:47 AM   #5
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I had good success with almost every yeast frozen in glycerin solution, except wlp300 (hefeweizen) which shows prolonged lag phase. I assume that viability was smaller than with other strains.
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Old 08-28-2012, 06:00 PM   #6
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Hey thanks a lot guys! Very helpful.


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