You could also try Java fern , or anubias , you can let them float in the tank , or try tyeing them to a rock , piece wood , or even pvc pipe .
Most medium and large cichlids have their own ideas about where anything they can move will go in the tank .......these plants will live , even grow just floating in the water column ......not sure if Jacks will eat them though , stopped keeping them before I tried live plants of any kind .......when I tried artificial plants , they would be found floating sooner more often than later .