Hi Mickey,
Glad to see you.
I'm really not into hibiscus. I swear. It grows, flowers, freezes, dies back, looks dead, I trim the dead stuff off and it comes back only to freeze again. I have no luck with this plant and am actually eliminating it from my yard. I have 3 very large plants when I moved here 6 years ago and still have just one very weak one left. Next time the tree trimmers come out it goes.
What are you doing with them. I would think you'd have lots of problems with freeze in Cave Creek!