I have one hibiscus right beside my back steps, don't know the name, but it somehow manages to return every year with no care from me. Then I remembered that my Confederate Rose is a Hibiscus. I trimmed it way back for the first time this year, it was reaching for the sun and was extending out in the way when I mowed. It had gotten pretty large.
Name: Anne Summerville, SC (Zone 8a) Only dead fish go with the flow!
Your pure white double is Confederate Rose too! About 10 years ago I grew 8 from seed and all the flowers on the plant were different from each other. I traded away all but one because It has the most amazingly different coloration I've ever seen on a Confederate Rose - an interesting bi-color .. When the buds start to open it's almost like someone took a paint brush to it on some of them!
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I'm happy it has made it. We had freezing temps last night. I think it was about 27° this morning. It didn't last long and warmed quickly, but I'm glad I brought a couple of things inside.