How long is smacker good?

Time to buy yeast. I want too buy 3 strains. Problem is… How long can I keep a smack pack in the fridge, before I need to worry? Btw I always use a starter.


At first I thought you misspelled mackerel.
Liquid yeast begins losing viability beginning at the date of production. Take a look at this site

I would be fine with using a simple starter for anything around 6 months old.

From there I would do a step up.

I have used then 16 months old with a 2 step starter. Took a while to get going initially.

Thanks all, that gives me enough confidence I can keep this many yeasties running