Great article! I bought three Rose of Sharon hibiscus plants last month and finally got them planted a couple weeks ago. (All three are doing very well, and one is blooming already!) Now I want to try Hibiscus Moscheutos; is it too late to plant these? I'm in Colorado Springs, zone 5, and just found some at auction (?!).
Get them planted, they still have lots of time to get established before winter sets in. Give them a good drink in really hot weather until they do get established. I've bought them at garden centres in the fall clearance racks and they've done fine planted that late.