Evan, I have at least 4 types of Heliconia. They are very easy plants, and I can't see why you couldn't have them inside through the winter as nice foliage plants. They might even bloom, depending on the temperature and light conditions you give them. Mine do die right back to the ground if it gets cold in the winter, but the last two winters they have not. So indoors they will keep nice foliage as long as you keep them warm. I think the critical thing to make them bloom is LOTS of water and fert as the weather is heating up in the spring. They do love water.
They are something like gingers in growth habit, in that they put up a shoot, make leaves then if the light and temperature are right that shoot will put up a pretty, long lasting bloom. Some of mine last a month or so, and the Lobster Claws lasted nearly 2 months before they started to look really scraggly this year. After the bloom is done, you should cut the shoot right off at ground level to encourage new shoots. They multiply by underground rhizomes like Cannas.
I have one type that was here when we moved to this house, and they wander around in my shady border under the big oak tree. This year with all the rain we've had, they are popping up in the gravel pathway, and have wandered out under the fence to make a pretty display around the base of the tree. Those ones are red/orange, and about 4ft tall. Some in the shadier areas might get to 5ft. They make lovely, long lasting cut flowers, too.
The Lobster Claws are over 6ft. tall, and have only really bloomed well for me this year. I give credit to all the rain for that.
I planted a whole bed of this smaller variety, 'Lady Di' last year. They have gone crazy, filled the bed and are popping up in the driveway this summer. They're about 30in tall in bloom and would make a fabulous house plant.
Last, these smallest ones are two-tone orange and only about 2ft. tall. Again would make a great house plant.
