All I can find online is "propagate from seeds".
Good luck with planting hybrid seeds! If you plant lots, you should be able to select some that you like. And then you'll have several totally unique individuals.
I hope you'll post back here saying whether your plant set viable seeds or not. I see "one seed at the base of each petal".
BTW, one site recommended soaking the seeds for one day or even two before sowing. And still expect them to take a week or two to germinate at 70F. You can direct sow outdoors after all risk or frost is over, or indoors 6-8 weeks before setting out.
