Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > White Labs Yeast longevity?
Reply
 
Thread Tools
Old 01-15-2009, 02:46 AM   #1
riromero
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2008
Posts: 286
Liked 3 Times on 3 Posts

Default White Labs Yeast longevity?

I got a vial of White Labs yeast American Lager strain from a friend of mine. Problem is, it's expiration date was Dec. 10. I was ready to brew my first lager so I warmed it up and pitched it into a 70F degree starter made from 1 pint of water boiled with 1/2 cup of DME. After roughly 10 hours, no signs of life are evident. I wanted to boil my wort tonight but now that plan is off. Is it likely that this yeast is dead a month after its expiration date?


riromero is offline
 
Reply With Quote
Old 01-15-2009, 03:00 AM   #2
Yooper
Ale's What Cures You!
HBT_ADMIN.png
Feedback Score: 0 reviews
 
Yooper's Avatar
Recipes 
 
Join Date: Jun 2006
Location: UP of Michigan
Posts: 65,967
Liked 6216 Times on 4428 Posts
Likes Given: 1666

Default

Lagers need a BIG starter. Check out the site called mrmalty.com. There is a yeast pitching calculator, and I would guess that you should have about a 1 gallon starter for a lager, especially for expired yeast. The yeast will still be good, but it'll take a while for them to revive and ferment the starter. 10 hours is really too quick for a starter anyway- a couple of days is more realistic for an ale yeast starter, and 5-7 days for a lager starter is more realistic. I like to make a small starter like you did, wait a day or two and "step it up" by adding another quart of 1.040 wort. Let that ferment out, and then do it again. Then, I stick my lager starter in the fridge (once it's fermented out) and decant the spent wort. I pitch the yeast when the yeast is 48 degrees, and the wort is 50 degrees for all of my lagers.

Hoped this helped!
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

Follow me on facebook: https://www.facebook.com/lorena.t.evans
But I'm pretty boring so don't expect much!
https://www.facebook.com/lorena.t.evans
Yooper is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
White Labs yeast TairyHesticles Beginners Beer Brewing Forum 9 04-03-2009 06:51 PM
Old White Labs Yeast emribecky Recipes/Ingredients 10 01-26-2009 11:19 AM
White Labs Yeast Leak Bouza General Beer Discussion 7 10-24-2008 10:12 PM
White Labs Yeast natehilde Recipes/Ingredients 2 01-04-2007 02:35 AM
White Labs Yeast madrean General Techniques 14 04-21-2006 04:06 AM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS