White Labs vial past "Best By" date... - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > White Labs vial past "Best By" date...

Reply
 
Thread Tools
Old 05-21-2012, 08:00 PM   #1
stjackson
Recipes 
 
Aug 2010
Columbus, GA
Posts: 146
Liked 19 Times on 12 Posts



I'm planning to brew a Belgian Pale Ale this weekend (OG 1.052), and the vial of WLP575 that was sent to me with my order is past it's "best by" date by about 10 days. I called the shop that sent it to me, and it was the last one they had. I was assured that the yeast had been kept refrigerated as long as it was at the shop and it went into my fridge as soon as it was delivered.

According to the Mr. Malty yeast calculator, this yeast has only about 10% of it's original viability. I do a starter with all my batches, but should I do a two-stage starter with this since it's likely to be pretty weak? For a beer this strength, I would normally do a 1L starter with a gram or so of Wyeast nutrient at about 1.040, let it grow for 36 hours or so, pop it in the fridge the night before the brew and decant the spent wort before pitching. I was thinking this time I might grow it once in a lower strength starter (maybe 1.030 or so), refrigerate, decant and pour fresh 1.040 wort on top and give it another day or so of fermentation to get my viability back up before pitching into the beer on brew day.

Is this overkill? Should I just go with my normal starter procedure and pitch as usual? I'm sure someone here has used a vial past it's "best by" date; how much is viability really affected?

Thanks for any input, I appreciate it.

 
Reply With Quote
Old 05-21-2012, 08:03 PM   #2
hopsalot
 
hopsalot's Avatar
Recipes 
 
Sep 2007
Corpus, Texas
Posts: 1,553
Liked 18 Times on 17 Posts


many times have i used yeast that was past the date, I just make a starter and all seems to work out.
__________________
In Illa Brettanomyces Nos Fides

http://bjsbrewery.blogspot.com/

 
Reply With Quote
Old 05-21-2012, 08:40 PM   #3
AmandaK
 
AmandaK's Avatar
Recipes 
 
Feb 2010
KCMO
Posts: 1,498
Liked 143 Times on 106 Posts


Normal starter is fine.
__________________
BJCP Master Beer Judge

 
Reply With Quote
Old 05-21-2012, 08:51 PM   #4
pohldogg
Recipes 
 
Apr 2011
louisville, KY
Posts: 287
Liked 32 Times on 18 Posts


You should do the step up. Even refridgerated, at 4 months you've lost a lot of cells.

Or just figure that a single liter will be fine and that it will work out.

 
Reply With Quote
Old 05-21-2012, 10:15 PM   #5
LLBeanJ
HBT_SUPPORTER.png
 
LLBeanJ's Avatar
Recipes 
 
Feb 2012
Windsor, CO
Posts: 2,674
Liked 601 Times on 441 Posts


Assuming a 5 gal batch, according to yeastcalc you need about 182 billion cells. Using a 1/11/12 viability date, with a normal 1.0L starter and a stir plate, you'd only be at 65 billion. That's some serious underpitching.

Do a .75L initial step, then follow up with a 1.2L second step. That'll put you right around 184 billion cells.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to find the "Born On" date of White Labs Yeast? RonRock Fermentation & Yeast 14 09-01-2015 01:18 PM
White Labs vial explosions ziggy13 Fermentation & Yeast 19 06-25-2013 01:28 AM
Pitching past White Labs 'best buy' date. jiggs_casey Fermentation & Yeast 10 11-02-2012 03:58 PM
fizzy white labs vial mk78 Fermentation & Yeast 4 07-31-2010 08:43 PM
Volume of White Labs vial? psuchunk03 Fermentation & Yeast 1 07-07-2010 02:31 PM


Forum Jump