Growing your own seds?

Ive aot several seeds from a plant that got pollinated (didnt get the boy out the room intime) so I thought I would try and grow some of them but none of them have germinated is there a time frame the seeds need to dry out/age/cure before being planted ? the seeds are about 3 months old.

the plant should be left til the end of its life so seeds are good......stored in dry, cool , dark conditions.......normal seeds are left 6 weeks before being used ..never had a prob with mine, got a pick of em?