I don't think hoping that they reseed is an issue. Hoping they don't ALL reseed is the issue. Even here in Northern Michigan, I now have these all over the yard. Too bad I don't have the same luck with the double yellow and purples. The tall oak leaf lavender ones spread like weeds too.
I do have to say that my yard smells terrific in the evening!
Yeah, the double purples are picky. I've tried, dried, and fried the seed pods and never gotten one, but I've wintered one over every now and then in a pot.
They are so worth it though. Like orchids for showyness.
The whites are lush in their masses, and for me the bonus is they can be out front and the deer don't bother them, and they do smell lovely. They great me in the morning and are almost as good as coffee!
I love seeing the critters in and aroun them.
I'm encouraged! Sounds like all I need to do is leave them alone - which I am good at - and then wait for them to come up next spring. I put these in a raised bed to give them the best possible chance. Maybe next year I will try some in the plain old clay soil and see how they do there. I've never tried a purple or a ruffled. Are they much harder?