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Old 11-03-2012, 07:27 PM   #1
Jan 2012
Sheboygan, Wisconsin
Posts: 11

Have vial of White Labs Belgian liquid ale yeast WLP550, been in refrig since delivered Jun-06-12, "best before date" reads Sep-04-12. Is this date "bible"? I'd like to brew tomorrow but if this yeast shouldn't be used I'm SOL cuz brew store isn't open til Monday. Any input would be greatly appreciated...

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Old 11-03-2012, 07:36 PM   #2
kh54s10's Avatar
Aug 2011
Tiverton, Rhode Island
Posts: 11,641
Liked 1863 Times on 1526 Posts

The actual manufacturing date is 4 months prior to the best by date. If you are making a 5 gallon batch you should have already made a starter. The older the yeast the larger it needs to be.

If it were me I would make a starter and put off brew day until it is ready. and are good sources of information on starters and have calculators to determine how much yeast you will need.

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Old 11-03-2012, 07:43 PM   #3
Golddiggie's Avatar
Dec 2010
Posts: 11,995
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I had some White Labs vials in the fridge, that was dated for use by March 2012, that I used this past weekend. I made three starter steps to get the cell count where I needed. After pitching the slurry, I had full activity in under 12 hours (going through the blowoff assembly)...

With a starter, or a couple of starter steps, you can use rather old yeast.
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