I can't seem to edit the personal info on my page so let it be said, I'm in ultra south Texas, Port Isabel/South Padre Island.

I've never seen Hawaiian snowbush before, but I can tell you that for stuff that spreads by rhizomes like cyperus, heliconia, and lemongrass (and bananas and ginger, etc.), you can typically let the tops get beat up in winter and then cut them back to the ground in spring so that new shoots come up and replace the old ones (which don't ever really recover, depending on how harsh the winter was). It keeps the plants much neater, especially things like cyperus).

I've been growing several clumps of lemongrass in my yard for years and never give them any special attention during cold weather. They even survived the 2004 Christmas 6" snow here in Rockport. And I have never cut them back, but I have cleaned out the dead outer leaves come spring. I would just let them be and see what happens. Good luck! Stay warm!

Wow, it must be nice to be 9b. I would love it. Are you getting hit hard by this winter freeze that's chillin us northerners in San Antonio?