The oldest seeds I ever woke up were 22 yo but right now I can't remember the name of the variety, but it's possible I might remember it
decided to google it and found it.
(I've awakened were 22 yo seeds of September Dawn)
Carolyn, just noting that when Craig L and I were getting seeds from the USDA station at Geneva,NY, when it was still possible to do that,many of the were DOA , I mean really dead.
One was Magnus, which was on the cover of the 1900 Livingston catalog, after several months I did get that one going and I just posted about that recently here at TV. The seeds from Magnus led to all seeds of Magnus known today.
http://t.tatianastomatobase.com:88/wiki/Magnus
Carolyn