How are you supposed to take care of a Hibiscus plant in the winter?

I live in zone 6 and my Hibiscus's are tropical. I bring them into my house and set them in front of south facing windows. They get a lot of heat and direct sunlight. I continue feeding and watering them and I have blooms all winter! In the spring I take them back outside and they go thru a shock. I then cut them back a little and it all starts over again! If you have an area in side you should try this. It is great to have the blooms all winter.
How are you supposed to take care of a Hibiscus plant in the winter?
I live in zone 5, and I have the hardy perennial ones. I do nothing. I leave them as they are. In the spring I cut off the old branches and wait.
Reply:do you have a green house? put in in there
Reply:If it is a perennial hibiscus then all you need to do is cover it with some straw or mulch for a little added protection from hard freezes. If your hibiscus is a tropical then you need to bring it indoors.

Good Luck