I guess I'll update here too. (Also discussed my TP in another thread). I babied the heck out of this thing, including a seedling heat mat, HVH fertilizer and Supernova, but unfortunately it has now seen it's last days

I think all of the special care was basically too little, too late. It's decline all started when I gave it too much sun when it first arrived, and then I think there was just too much change: from being outside, to going inside, trying different locations inside the house; and all of this during the change from Summer to Fall and finally to Winter. And the fertilizer and Supernova wasn't until it was on it's very last leg. This was a learning experience for me and I think I learned a lot about how tricky hibiscus can be!
I really, really hope I get the chance to purchase another one for Spring!!!! I want some Tahitian Princess blooms!!! If the wishlist didn't have to be in alphabetical order it would be at the top!
RIP Tahitian princess.