In article ,
Tom & Debbie wrote:
Is there a shelf life for innoculant...I have some left sitting in my
cabinet from a year or two ago and was wondering if it is still effective?
debbie

Check the label, it probably gives some information.

Like any other living thing, it won't last forever. But if you can keep
it cool and away from the damp, it will almost certainly be ok for a year,
probably considerably more.

-frank
--