freezing yeast cultures

shortnstout · Aug 27, 2012

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

evrose · Aug 27, 2012

1. All of them.

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

theredben · Aug 27, 2012

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).

kh54s10 · Aug 27, 2012

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!

diS · Aug 28, 2012

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.

shortnstout · Aug 28, 2012

Hey thanks a lot guys! Very helpful.

freezing yeast cultures

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freezing yeast cultures

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