I would think you might want to try some of the 'Luna' series of hardy hibiscus. I see some available from Park Seed. They are not cheap but once you have a baby or two growing you can sometimes get seed from it. They bloom first year from seed if started in the Jan- Feb time frame.
Good Luck and Happy Growing David

Thanks David, I was thinking of giving the Luna series a try.

Terry

I'm typcially in zone 4 but have seen -45 F. and -39 F. temperatures at my home. They all seem to bloom about the same time for me, although some of the newer varieties like "Moy Grande" bloom later. Here are some pictures of some of the many varities I have grown for years.

Arctictropical, thank you for posting the awesome photos!Would you possibly be able to name the plants shown and the earliest to flower? Can plants be in flower in August? Thanks ...

Terry

Thanks Terry.

Here are the names in order of appearance:

Sweet Caroline
Moy Grande
Lord Baltimore
Raspberry Rose
Ann Arundel (or Garden Pink?)

I might be able to dig up pictures of other varieties if you wish to see some others. They all seem to start blooming the beginning of August until frost in zone 4 except Moy Grande. Moy Grande is about two weeks later and blooms on plants that reach up to between 6 and 7 feet high. Most are about 5 to 6 feet high, although Lord Baltimore and Raspberry Rose gets almost as tall as Moy Grande.

Wow, those are spectacular. Do you ever save seed and have it to trade?