Any I've grown have self sown reliably. You're in a Z10? Normally I would say sow outside in Fall through late winter, cold frame or protected pot, but if you don't have much in the way of winter, give the seeds a moist chill of 4-6 weeks at 35-40F (your refrigerator). Barely cover seeds, some light may be beneficial to germination. And be patient, they could still take from 1-3 months to germinate after the moist chill.

Thanks for the info. I will try again maybe I was too impatient. I am in zone 7 central Ga. the seeds are tiny so I will try not to bury them and kill any chance of germination.