Jim wrote:

Why not? Seeds, if properly stored, will last many years, with a
slight decrease in germination percent each year. I have successfully
planted 10 year old seeds numerous times....


Onion seeds do not remain viable more than about a year. If I save them
until next year, a few will probably germinate but not many. OTOH, I
routinely save tomato and peppers seeds for 5 or 6 years.

Best regards,
Bob, in Minnesota