Question

What are the difference between old seed and new seed?

Explanation:​

Answer 1

Answer:

They should be stamped "Packed for 2006", or 2007, or whatever year the seeds were sold at retail. Seeds that are only a year old, or slightly older but whose packets are still unopened, generally germinate nicely. ... If they don't, or if less than a third wake up, get fresh seed.

Answer 2

Answer:

If they're several years old, the packs were opened and/or the seeds were stored in less than ideal conditions, subject them to a germination test. ... If they don't, or if less than a third wake up, get fresh seed.