Pampas Grass
REPORT IF SEEN: This species is currently controlled by KISC, if you see it please report it.
Pampas Grass
Species: Cortaderia jubata, Cortaderia selloana
Family: Poaceae
Although there are no known populations of Pampas on Kauaʻi, KISC will actively control this species. Sightings of this pest should be reported immediately. If you suspect that you have any of our targets on your property, KISC will survey and if confirmed, will remove it for free.
Considered very invasive and is on the Hawaii State Noxious Weed List. The Division of Forestry and Wildlife of the Hawaii Department of Land and Natural Resources has designated this species as one of Hawaii’s Most Invasive Horticultural Plants.
Description
- Large clumping grass that may reach 2 meters (6 ft) or taller
- Leaves are narrow and have sharp, serrated edges
- Showy white-to-purple flower plumes are sometimes used in floral arrangements
- Native to South America, introduced to Hawaii as ornamental plant
Impacts
- Seeds are spread long distances by wind. In native forests they outcompete native plants and create a fire hazard.
- Cortaderia jubata plants are able to produce viable seeds without cross-pollination
- C. selloana, requires cross-pollination between male and female plants to produce viable seeds, spread primarily by wind. The invasive nature of C. selloana was not recognized in Hawaii in past years because only female plants were cultivated and sold. Male plants are now available.
- Serious pests in California and New Zealand
On Kauai
The two known populations in Lihue and Kokee have been eradicated. KISC is working to educate the general public about the invasiveness of these plants.
On the Pono Endorsement Black List. Pono Endorsed Nurseries and Landscapers have agreed to continue to not sale Pampas Grass.
You can plant pono by reporting Pampas Grass to KISC at 808-821-1490 or kisc@hawaii.edu . KISC crew members can remove it from your landscaping free of charge and help identify suitable replacements.
Look-a-likes:
Sugarcane
Saccharum officinarum
Can be mistaken for Pampas Grass as they both share a similar looking pink toned plume, however sugarcane’s plume is much smaller than Pampass Grass. Sugarcane does not clump like Pampas Grass.
Purple Fountain Grass
Cenchrus advena
Has a similar growth form to Pampas Grass, as it clumps and produces a feathery plume, however Fountain grass is much smaller in size and plume.
