Kahili ginger (Hedychium gardnerianum), a native of the Himalayas, is a gorgeous plant, which puts forth a generous display of fragrant, showy flowers. Too bad then that another description for the plant is ‘invasive weed.’ It thrives in moist areas – pretty much anywhere on the east side of the island. Its rhizomes form dense mats, and crowd out native seedlings, and birds eat the fruit and spread the seeds.

Controlling the spread of this plants requires its complete removal, but even then regular follow up is required as the plant can reestablish from dormant seeds or scraps of rhizomes left in the soil.