how long after sell by date are garden seeds good?
Seed sold in the US and other parts. of the world must have a lot number and a sell by or packaged for date that is 8 to 12 months. (can be longer if the seed is sealed in heretically sealed packet) from the time the seed was tested. for germination. Seed can be 10 years old and still be sold with an expiration date 12 months away as long as it. has been germination tested and passed. There are number of seeds that do not germinate when fresh, but need months to years of dry.