 I've never deadheaded them. Do I just cut the top off if I want them to start blooming again? Yes, but don't cut them too deeply. I would say one of the ways to get them to branch is to cut that center piece, but don't cut it any shorter than the ones around it. And then you're more likely to get a branching effect if you'll do that. Hibiscus usually respond that way, and Texas star is not any different. Oh, that's beautiful.