Wild Ginger

Also known as:
Kahili Ginger
Family:
Zingiberaceae
Origin:
South Africa

General description

Herbaceous perennial plants <2m tall. Large, branching rhizomes that form dense layers <1m deep. Large wax-covered, lance-shaped leaves. Has lemon-yellow flowers (Feb-Apr) with conspicuous red stamens; under full light conditions, <100 seeds produced per flowerhead.

Forest edges, plantations, road edges, streams, unfarmed land. Prefers open light-filled areas also readily grows under forest canopy. Large risk in lowland broadleaf & kauri forest.

Spread locally from rhizomes, which sprout annually. Also spread from rhizome fragments. Kahili ginger also spread by bird dispersed seed.

Forms dense colonies smothering native plants & preventing regeneration.

Site management

Maintain rolling front, eradication can be easily achieved. Don’t replant sprayed sites for 6 months.

Recommended approaches

1. Slash stems & dig out all rhizomes. Young seedlings can be hand pulled, taking care to remove strings of rhizomes.
2. Cut above pink “collar” at base & stump paint (1g metsulfuron/1L or Vigilant gel).
3. Spray dense patches away from roots of vulnerable species, spring - late autumn (5g metsulfuron + 10ml penetrant/10L).

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

Similar species

yellow ginger
Hedychium flavescens

RPMS status

Containment (removal) - Waitakere and Hunua Ranges weed control zone
Containment (removal) - Great Barrier Island
Surveillance - Whole Region
Community Initiatives - Whole Region
National Pest Plant Accord species - nationwide
wild ginger - Main species image