Ecology
The ecology of Hedychium coronarium has been little studied. It appears to be relatively shade tolerant, as indicated by its growth in partial shade at Kamakou Preserve. It is capable of growing in exposed sites. Seed is produced at lower elevations in Hawaii, but have lower dispersal potential because seeds are not displayed for avian vectors (Smith pers. comm. 1985). Seed is not produced on Hawaii Island at 1,200 m elevation (Cuddihy pers. comm., Hawaii Volcanoes National Park, 1991). White ginger does not produce seeds at Kalopa State Park at 600 m (Tomich pers. comm., State of Hawaii, 1991 ). Exact elevation limits to seed production are not known. White ginger distribution at Kamakou Preserve can be explained by dispersal of rhizome fragments by water or road maintenance machinery. Dense colonies arise vegetatively by spread of the rhizomes.