Wayyyy past Expired dry yeast: Toss it or pitch it? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Wayyyy past Expired dry yeast: Toss it or pitch it?
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 05-25-2013, 05:45 PM   #1
DUDEbeer
Recipes 
 
Jul 2006
Posts: 20


So I was digging through some old home brew equipment and found a nice surprise box with about a dozen packets of dry red star and Nottingham ale yeast. Come to find out I bought these back in 2007 and the expiration on them showed 2009 to 2010.

Was wondering these still may be viable for use even way past expiration? They're still sealed and have been sitting in my basement this whole time.

Even though it is cheap to replace, I'd hate to toss something if it still good to use.



 
Reply With Quote
Old 05-25-2013, 06:02 PM   #2
winvarin
Recipes 
 
Apr 2009
Edmond, OK
Posts: 1,136
Liked 54 Times on 49 Posts


2 choices.

Choice 1 - use mrmalty or a similar calculator to estimate viability. Then depending on what you find, make a small starter a day or 2 before brewing to ensure they are still alive. Also use mrmalty to approximate pitching rate.

Choice 2 - dose your boil kettle with 1/2 pack or so of the dried yeast per 5 gallons around 10 min before the end of the boil and let your fresh yeast use it as nutrient.



 
Reply With Quote
Old 05-25-2013, 06:03 PM   #3
drawdy10
Recipes 
 
Apr 2011
brookings, sd
Posts: 363
Liked 21 Times on 17 Posts


Throw one is some starter wort and see what happens I Would be shocked if there is 0% viability

 
Reply With Quote
Old 05-25-2013, 06:09 PM   #4
IslandLizard
Progressive Brewing
HBT_LIFETIMESUPPORTER.png
 
IslandLizard's Avatar
Recipes 
 
Jan 2013
Pasadena, MD
Posts: 6,057
Liked 987 Times on 848 Posts


^^^ Make a starter. That's your test for viability and ramps the cell count up.

I recently made 2 batches using S-05 with an expiration date of 2010. They had always been stored in the freezer.

For all security I made starters and they both worked fine.

 
Reply With Quote
Old 05-25-2013, 10:21 PM   #5
DUDEbeer
Recipes 
 
Jul 2006
Posts: 20

Giving the starter a shot, lets see what happens!

 
Reply With Quote
Old 05-26-2013, 05:29 PM   #6
DUDEbeer
Recipes 
 
Jul 2006
Posts: 20

Hm good news. I used some malta goya and cut it with 50% water, measured an SG of 1.030. Pitched the red star montrachet into 16 ounces of starter and after 12 hours ended up with a nice head of krausen, checked the SG after 24 hrs and it was floating around 1.010--- I think they're good!



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Contaminated yeast starter? Toss or Pitch? ronsonn Fermentation & Yeast 1 02-08-2013 08:57 PM
Pitched a starter with dry yeast - to toss or not to toss? bbshopplf Fermentation & Yeast 2 03-30-2012 02:43 PM
Yeast -- toss in or toss out? DCBrewer Fermentation & Yeast 8 12-29-2011 08:10 PM
Dry yeast - How expired is too expired? MorningGloryBrew Fermentation & Yeast 14 07-25-2010 12:47 PM
Wyeast ? Pitch or Toss THart General Techniques 10 06-06-2009 07:08 AM


Forum Jump