Thanks Ken, for holding my hand.
I will plant some tomorrow & mulch them well, and then store the others as you recommended until spring. The guy that I purchased my Stromanthe Triostar from said that it is hardy here. I planted it, but now I'm 2nd guessing myself. I'll divide that one as well. It is so beautiful that I just can't bear the thought of frost turning the leaves to mush.
I'll keep the other half in a sunny window in my garage or bring it in if I have to. This is my 1st year leaving my curcuma elata in the ground, but I need to dig up one rhizome for a backup. I brought the shell ginger inside, as it only flowers from the previous years' growth, and I want to see the blooms. It might go dormant if I keep it in the garage, in which case I may as well have left it in the ground. Last year I overwintered the curcuma and some heydichium rhizomes in a pot in the garage after cutting them back and they came up fine when I planted them in the spring. I'm not as worried abouth the heydichum as my others have survived overwintering in the ground and I didn't know then that I should mulch them. I'm learning a lot so late in the season & I've got to move fast, because we are expecting frost tomorrow and Tuesday nights. I still have plenty of work to do.