I just noticed that the the White Labs liquid yeast package we bought last week was past it's "Best if used by" date by nearly a month. Should we ask to exchange at our HBS or is yeast still usable for a honey porter?
My Cooper's cans have dot matrix printing on the bottom (the end you have to open). My last one says "09:10 best before 07/01/12 lager" as an example. Made September 2010,best if used by July 1st 2012. Yeast packets usually have a "julienne date" stamped on them. That basically means the date the yeast was packaged. For instance,the Coopers ale yeast I got with the can of LME had "32809" on it. That meant it was packaged on the 328th day of 2009. Def made a starter for that one! But I'll make starters from now on. It's really easy to do,& makes the ferment start faster & way stronger!All I saw was a use by date. Besides asking, how would you know how old the yeast is? Additionally how do i know how old the lme is?