Can SS expire?

no.........good forever.

i found remnants of an old batch from 10 months ago in an garbage bin. Didn't smell funny so i used in one pot, and it worked fine if not better then 1-month-cooked stuff IMO

sweet! Thanks fellas!

SS is usuly good for a year. After that I would make more.

Your SS will expire when you do.

Oh, I thought you meant Social Security. My bad.

i left a stalk and root ball in the contaner after harvest, and a coulpe mounths later it composted all the roots and part of the stem. good way to clean you used soil, just let it keep composting

yes it gets better with age. especially if you can control the level of moisture.

you guys are all wrong if the mix goes anaerobic you will have put it in the sun and let it dry out and build you micro pop again.
but it will last a few years before this happens so long as its not overly wet.