I enjoyed reading the history about the Rose of Sharon. One point you made is that it grows so easily that some consider it invasive. I am one of those people! I have a love-hate relationship with it.
Right now I only have two white Rose of Sharon shrubs, but your article has made me want to get more despite the profusion of seedlings. I think the Rose of Sharon is one of the very few plants blooming on my property in August, so color is kind of blah right now.