Tropical Landscape Bed - This lush bed contains only 4 plants. The contrast in heights & color give it a well-balanced look. All of the plants will work for zone 9 (except palm-see below for alternatives), but a very cold night or frost may cause some to have foliage damage or die back to the ground-returning in Spring. Christmas Palm Tree [Queen, Foxtail, and King best suited for zone 9]. Elephant Ear (Colocasia). Hawaiian Ti Plants (Cordyline Terminalis). Philodendron (Xanadu).