For such a long time, seeds lie dormant in the earth (awaiting spring). What keeps them from rotting?
If they’re not wet, they’re probably not going to rot. Most have an outer layer that keeps them dry.
That’s off the top of my head – I’ll move this to GQ for a better answer from someone who’s actually studied biology.
twickster, gardener and MPSIMS moderator
Here’s a basic explaination. Scroll all the way down and click on the link for Seed Dormancy Mechanisms, good explaination. I’ve got a lot on my plate for the next two days, but would be willing to clarify any questions you have if not answered in upcoming days.