If you take cuttings then they will come true. If you do grow seed then they may not come true but you may get some lovely colours.
I assume you know to remove any flowers/buds/seed heads off the material you intend to use for cuttings. This will make the plant send hormones down to initiate root growth.

Thank you Seaburn. Yes, I do know how to take cuttings but it never hurts to be reminded. I’ll wait until flowering is over I think. Or, on the other hand I could take a few cuttings now as well as later as they won’t all take.
Thanks again.