I just finished a seed run, and now I wondering how long to allow the seeds to harden before I can plant them? I have read wait about two weeks. Is this true?
Yup, I've seen ripe seeds germ right in their calyxes on their over ripe mother in high humidity conditions.
Considering everyone's environment is different, and if you have lots of spare seeds, I'd suggest doing a couple germ tests, some right away after harvesting, the others 1-2 weeks later, to see what gives you the best results.
Some people like to freeze them to help them germ faster, but that isn't be necessary. Go ahead and plant them, though if you have a lot of seeds try several methods and see which works best.