I was very interested in reading your article. Are you writing about the Hibiscus/Rose of Sharon trees? I have 3 of them - one a pure white (bees love that one) in the hottest sun and 2 lilac (one double, one with a red ring near the center).
But, if you are talking about a plant that is not a tree, sounds like I would like some seeds from you!
I'd be happy to send you some seeds, too, if you think you'd like some pods. We are in Arlington, Texas and it doesn't get nearly as cold as Michigan but we do have some cold spells and freezes here.
Not rose of Sharon, these are a perennial plant, not a woody tree, very hardy, the mother plant is over 50 years old. sometimes advertized as Disc-hibiscus. large blooms 6-10 inches across, rose, pink, of a verison of these colors.
Send me a small padded envelope and three frist class stamps, if you want seeds. And Instructions for growing