Yeast storage and longevity

[Crusty]

I store my IDY yeast in my refrigerator in a mason jar that has a sealed lid. 

How long will this keep and still be fresh/active  ?

Is the freezer a better place to store yeast?

Thanks,

Crusty

[Pete-zza]

Crusty,

Instant yeast has a good shelf life, about 2 years if the package is unopened (and not refrigerated), and 6 months if tightly resealed and refrigerated after opening and, for added protection, stored in an airtight container.  If frozen (also in an airtight container) the instant dry yeast will last almost indefinitely (although yeast producers usually recommend a much shorter time period—about a year). I keep mine in the freezer.

Peter