Koki'o ke'oke'o   Hibiscus arnottianus subsp. arnottianus, H. arnottianus subsp. punaluuensis, H. arnottianus subsp. immaculatus
Koki'o ke'o ke'o   Hibiscus waimeae
Koki'o ke'oke'o is a large vigorous white Hibiscus. Prune heavy and often for very dense hedge material up to 15 feet tall. Plant in full sun and give regular water and fertilizer.

see moisture zone map here
more info on koki'o ke'oke'o   Hibiscus arnottianus, Hibiscus waimeae