Thank you very much for the list on seed longevity. The Mississippi Silverhull seeds I have are 20 years old. I keep all leftovers in the freezer. Do you ever retain seeds? My brother never does.
I’m pretty sure some of my seeds are around 20 years old, too. I’ve never thrown any away for being out of date. And I’ve never had problems with germination using old seeds, although I do know people who have. Most of my seeds are in a corner of my room, the only ones in the fridge are the ones that needed cold treatment.
I know of 2 people who found seeds in a clay pot during an archeological dig that were over 1000 years old, who still managed to grow them. One was a bean and the other a watermelon.
There are some varieties that I’m told lose viability faster than most. I think onions were one of them? I wish I could find the chart I remember seeing, the two I posted have different numbers than what I remember. Still useful, but different.