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Photo Credit: Forest & Kim Starr

image description

Photo Credit: Forest & Kim Starr

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Photo Credit: Forest & Kim Starr

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QUICK FACTS

  • HPRWA SCORE 16
  • FAMILY Zingiberaceae
  • CATEGORY Shrubs, Vines, & Others

Himalayan ginger, kahili ginger (Hedychium gardnerianum)

An ornamental ginger that quickly escaped the garden and naturalized in Hawai`i's natural areas. The Division of Forestry and Wildlife of the Hawai`i Department of Land and Natural Resources has designated this species as one of Hawai`i's Most Invasive Horticultural Plants.

  • A coarse ginger with leafy shoots growing up to 6 ft tall
  • Leaves (7-17 in long by 4-6 in wide) clasping the tall shoots in an alternate pattern
  • Yellow flowers with long red centers grow in spiked cylindrical clusters
  • Naturalized on most of the main Hawaiian islands, native to the Himalayas
  • Seeds spread by birds, root fragments will also regrow

Harm

  • Spreads rapidly and becomes dominant over large areas of natural areas
  • Underground rhizomes form dense mats preventing other plants to grow in the area
  • Can block streams and overwhelm crops as it has done in other areas

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