When do you cut back the branches of the Hibiscus plant when you bring it in for the winter? My Hibiscus have a few leaves left,but I want to cut the branches back. By doing this will it help the plant to fill out in the summer?

wait until it is actively growing. cut back maybe half of the branches 1/3 then wait till the cut ones start blooming again then do the others that u didnt cut the first time. remember that u can direct it how to grow by where u cut it.