Granny, how long would a packet of seeds last? Do they have expiration dates?
If kept cool and dry, they will last 5 to 10 years.
Some less others more.
Some say they loose about 5% of the seeds each year, so you will need to plant more thickly.
Sealed in a coffee can, with a couple pouches of dried milk to take the moisture that might collect is a good idea, dark and cool is the ticket.
I have planted 10 year old onion seeds and gotten a crop, even tho they will tell you that you need a fresh crop of onion seeds each year.
Any seeds you have left over, save them and buy extra of the main crops.
Try to not buy the hybrids, as if you save the seeds from hybrids, most time you will get nothing from them but a plant.
LOL, but yes, I also plant the saved seeds from hybrids for the simple reason that every seed should be planted.
I can’t think of a hybrid saved seed that has ever produced for me.