PS As a native Texan living in Oman for now, we have the wild orange-red trumpet vines growing here....they are beautiful but the heat of the summer (which can reach over 120 degrees F), I think, keeps them in check.....unfortunately I have not seen hummers here, though sun birds do abound....they're tiny, of irridescent plummage, long curved beaks for getting nectar, and unlike hummers do not fly backwards but do perch.....they, too, are a pleasure to watch and I have a small backyard that has lots of blooming vines that they adore especially the golden bells...........