Dry yeast - How expired is too expired? - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Dry yeast - How expired is too expired?

Thread Tools
Old 07-19-2010, 06:26 PM   #1
Apr 2008
Posts: 27

Picked up ingredients from the LHBS for a steeping/extract trippel to be brewed this weekend. I got home and realized the dry yeast packets they gave me (S-33) expired in April 2009.

Assuming the yeast packets were kept refrigerated the whole time, will they kick in and do their job? Or should I brave the traffic and get newer yeast? (The store is a good 30 minutes away and involves maddening traffic... and I would need to take an hour off work since they close at 6 during the week.)

I'm still pretty pissed that they sold me something that's been expired for a year+.

Reply With Quote
Old 07-19-2010, 06:59 PM   #2
Jun 2010
West Michigan
Posts: 71

Oh yeah, I'd be irritated too! I'm in the same situation. Too far from LHBS to be given old yeast! Call him up and let him have it!

Can you boil up a little of the brew and create a starter for it? Or do you have some leftover LME or DME or even some malt grain you can crush and steep? By using a starter you can know right away if you got ripped off or not.

Reply With Quote
Old 07-19-2010, 07:26 PM   #3
Bensiff's Avatar
Mar 2008
, Washington, the state
Posts: 4,924
Liked 392 Times on 310 Posts

I would do a starter to keep my mind at ease; however, modern techniques to create dry yeast produces an extremely stable product so you are likely to be fine.

Reply With Quote
Old 07-19-2010, 07:29 PM   #4
Uncle John's Band
shelly_belly's Avatar
Jul 2009
Blow Southerners!
Posts: 1,657
Liked 189 Times on 149 Posts

I've used Montrachet yeast that was at room temperature for about 5 years and it worked great.

Reply With Quote
Old 07-19-2010, 08:37 PM   #5
I like 'em shaved
bull8042's Avatar
Jul 2008
Fort Mill, SC
Posts: 10,263
Liked 452 Times on 448 Posts

I would make a starter a day or two before brewing. If it takes off, great. If not, then you have to brave the traffic. Even though it was only a couple of bucks, I would still mention it when I went in. It is up to them if they want to take your word that they sold you some old stuff and make it right. But it will at least give some insight as to whether you want to spend any more money there or start ordering from some of our great online vendors here.
"I brew with a water cooler and some part from the toilet." - JohnnyO

"I do gravity feed the last gallon or two through my Therminator, but I expect you could suck start a Volkswagen before you could suck start one of these. - GilaMinumBeer

"..... Bull was right." - TXCurtis

Reply With Quote
Old 07-19-2010, 08:57 PM   #6
midfielder5's Avatar
Jan 2009
San Francisco, CA
Posts: 1,448
Liked 72 Times on 64 Posts

Just call the store and have them mail you the replacement.
i have gotten replacements that way.

Reply With Quote
Old 07-19-2010, 09:09 PM   #7
david_42's Avatar
Oct 2005
Oak Grove, Oregon, USA
Posts: 25,595
Liked 153 Times on 144 Posts

Make a starter. The yeast is probably okay, as-is, but a starter would take care of any problem.

Reply With Quote
Old 07-20-2010, 02:57 AM   #8
Jun 2007
Riverside Ca
Posts: 99
Liked 2 Times on 2 Posts

I think the just pitching it, and not building a starter. If it doesnt work repitch with fresh yeast...

Reply With Quote
Old 07-20-2010, 03:04 AM   #9
Jul 2009
Posts: 5,068
Liked 265 Times on 226 Posts

pitch it. it should work. i have some yeast that expired in april 2009 also, and when the time comes for me to use it, i'm just going to pitch also

Reply With Quote
Old 07-21-2010, 05:32 PM   #10
Apr 2008
Posts: 27

Thanks for the replies, everybody. I was all set to just pitch it (and potentially re-pitch if fermentation didn't kick off), but it turns out that SWMBO will be near the LHBS on Friday... so for the moment, I'm planning on returning the yeast and getting packets that are fresh... or at least less drastically expired.

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Starter from expired yeast Llama Fermentation & Yeast 6 04-10-2010 07:54 PM
I used some expired yeast... tom777 Fermentation & Yeast 4 03-17-2010 04:37 AM
Mr Malty Pitching Rate and Expired Yeast DKershner Fermentation & Yeast 17 02-08-2010 07:32 PM
Expired Dry Yeast surfingpl Fermentation & Yeast 3 01-03-2010 05:04 AM
Expired Yeast CuddlyBurrito Fermentation & Yeast 4 10-29-2009 01:46 AM

Forum Jump