Asking about growing old seeds is a loaded question in my family. My dad was notorious for saving something he liked and stashing it in the cool, dark, unfinished basement in IA and then it would resurface in the future in an unlabeled pill bottle or jar after unknown years or decades. I've had ipomoea make it past the decade mark easily. The winner is the Black Krim tomato that I remember mom specifically buying from the grocery store at a markup bc it was labeled as the heirloom it was so she could grow this variety she remembered her mother growing when she was a kid my age. She saved those seeds when she grew them out the following year around 1992. I found them 20 years later cleaning the basement and while they took over a month to emerge they did just fine. Any of you who grew that tomato from me grew that time warp strain. I don't even look at the age of seed when picking tomatoes in a swap for this reason.
