Confederate Rose (Hibiscus mutabilis)
I don't know how easy this is to start from seed, but thought I'd offer it up. This is the double pink from my backyard in Houston. Mine is in a big pot and is currently about 6 feet tall. Leaves are now coming back after the winter.
If you want to try to grow it send me a personal message with your address.
Update: seeds have been taken. No more are available at this time.