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Old 10-14-2012, 02:46 PM   #1
TxBrewHouse
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Jul 2012
Greenville, Tx
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I accidentally froze my yeast. I wasn't paying attention to what I was doing. Think they'll be ok or do I need to buy more.



 
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Old 10-14-2012, 02:58 PM   #2
MG1602
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Feb 2011
Richardson, Tx
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Buy more. When you freeze any living organism, you have to use some cryoprotectant. You didn't, so your yeast are dead. When water freezes, it crystallizes. Think about all these tiny swords being created and puncturing the cell walls of the yeast.



 
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Old 10-14-2012, 03:06 PM   #3
TxBrewHouse
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Jul 2012
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I knew that but I guess deep in my heart I was hoping they would be ok. Now I have to drive an hour to go get more.

 
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Old 10-14-2012, 03:14 PM   #4
Flycal6
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Sep 2011
, Mid East
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Pitch it and see what happens. Any yeast spores can probably take the freeze. Worst case scenario: nothing happens.

 
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Old 10-14-2012, 03:15 PM   #5
MG1602
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Feb 2011
Richardson, Tx
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The heartbreak is better now than when you realize than that your whole batch of beer is crap!

 
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Old 10-14-2012, 03:16 PM   #6
MG1602
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Feb 2011
Richardson, Tx
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Quote:
Originally Posted by Flycal6
Pitch it and see what happens. Any yeast spores can probably take the freeze. Worst case scenario: nothing happens.
Man, why do you want to set yourself up? Bad advice.

 
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Old 10-14-2012, 03:31 PM   #7
Flycal6
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Sep 2011
, Mid East
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If the yeast are all dead, I think they would just sink to the bottom of the fermenter. Toss in a new pack the next day. If they start fermenting though, you saved yourself that hour drive.

I can't see a down side.

 
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Old 10-14-2012, 03:33 PM   #8
Flycal6
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Sep 2011
, Mid East
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But take my advice with a grain of salt. I've skunked my share of beer.

 
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Old 10-14-2012, 03:43 PM   #9
stonebrewer
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Mar 2012
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I would make a starter with it well before you want to brew and see if it krausens. If it does, then you are okay...enough yeast survived the cold temps. Put the starter in the fridge until brew day, take it out when you setup and it should be good to pitch at the end of the day.

Did you freeze it solid? If so, it probably will be completely dead. I have partially frozen yeast before and had no problem getting a starter going and a rocking batch of brew afterwards.

 
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Old 10-14-2012, 03:46 PM   #10
wolfman_48442
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Mar 2011
Fraser, MI
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There is certainly some cellular damage, but you may well be able to recover.
It's critical that you make a starter before pitch for a few reasons:
  1. See if you have any viability (see if the starter is active)
  2. Rebuild your cell count up to where it should be
  3. Beers even under the best conditions benefit from proper pitch rates, which normally means making a starter
With that all said, don't give up. I and many others here have had a brain fart and frozen our yeast, and been able to recover and make a great beer after building a proper starter.



 
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