Is this pretty common? I usually order from NB and get yeast that is usually at most 1 month old. My LHBS carries strictly white labs and the “best by” date on most of them were around 5 weeks from today. White labs “best by” date is 4 months before the package date so these are just under 3 months old.
Is this common for smaller LHBS’ to have yeast this old or should I start looking for a new LHBS? The last few times I wrote it off as a convenience thing.
I realize its just an estimate but that puts this yeast below 50% viability. Should I risk under-pitching or should I do a 2 step starter for my next brew just in case? Using Jamil’s formula, yeastcalc says I’m under-pitching with a 1 step 2L starter, but using Kai’s formula I should be pitching enough.