I have planted many of these hibiscus here in Louisiana & people LOVE them. In fact, here we call them the "DINNER PLATE" hibiscus because the flowers are literally bigger than a dinner plate.
I am a landscaper & recomend these wonderful plants for anyone who wants low maintenance & magnicificent flowers. The only downfall I see is they usually do not seed for propagation. Cut back in the winter & mulch heavily & fertilize well in the Spring & stand back & watch.
I am mostly amazed @ the men who like this plant. Men who do not even like flowers go out of their way to see these plants bloom every year.
My mother had a hibiscus that was hardy but the flowers were much smaller. There was one that was deep pink, one pale pink and a white one with a deep pink throat. The 'dinner plate' blooms are beautiful but where can I find plants that have the smaller blooms. The plants Mom had probably would be considered heritage plants because she got them from her grandmother's garden.
I love these plants as well. I live in Ohio and have them in my backyard where people stop and admire them all summer. People have even identified my house by them..."Oh, you have those gorgeous flowers in your yard. We wait for them to bloom every summer." I've shared seed pods with friends that have asked for them but I'm not sure that works well. Tubers are the best way to start them. The only problem with them and it's a big problem for me are the Japanese Beetles. They love them! It's a constant battle!