Other things to consider:
- Quarantine (in the garage/bathroom) newly-bought plants for a couple days before planting in your yard or garden. Inspect them for ants, frogs, or other unwanted pests.
- Report illegal or suspicious insects and animals to the state pest hotline: 643-PEST, or call your island invasive species committee.
- Wash your hiking/dive/fishing gear before and after use.
- Grow local, buy local. Ask your grocer, lei shop, garden shop, or nursery for local grown produce, flowers, and plants.
- Do not mail order plants or seeds. There are too many plant diseases, insects and other creatures that are being moved around the world. Buy local from trusted sources.
- You must declare all plants, plant parts, seeds, and produce for inspection when importing to Hawai‘i. Don’t bring in prohibited pets, plants or fruits.
- Be cautious when moving things inter-island. Plants are only one way that pests are spreading. Coqui have moved from infested areas to coqui-free islands in vehicles, outdoor furniture, and PVC pipes, and little fire ants have been found in cut flowers, on hapuu logs, inside the plastic casing of a cane knife, and other unexpected places.
- Get involved! Each island has an Invasive Species Committee and other groups that are working to protect our islands from invasive species.
More on Native Hawaiian and Pono Landscaping Plants
The Native Plants Hawai‘i website has photos and tons of great information http://nativeplants.hawaii.edu/
The Honolulu Board of Water Supply http://www.hbws.org/cssweb/display.cfm?sid=1155
Although dated (1992), this Office of Environmental Quality Control publication on planting native Hawaiian gardens gives good information: http://oeqc.doh.hawaii.gov/Shared%20Documents/Misc_Documents/1992_How_to_Plant_a_Native_Hawaiian_Garden.pdf
The College of Tropical Agriculture and Human Resources (CTAHR) free publications on Landscaping, Pests, and Weed Control. They also have a wonderful Native Plant Propagation Database.
More on Plants to Avoid
The Department of Land and Natural Resources’ list of some of the most invasive horticultural plants http://www.state.hi.us/dlnr/dofaw/hortweeds/specieslist.htm
The Landscape Industry Association of Hawai‘i’s articles about invasive plants and animals: https://www.hawaiiscape.com/category/invasive-species/
Hawai`i noxious weed rules
This is the official State of Hawaii Department of Agriculture (HDOA) administrative rules RE: noxious weeds (HRS 4:6:68, "Noxious Weed Rules"), which includes the list of designated noxious weeds in the state of Hawaii.
Hawai`i Noxious Weed Control law
This is the official State of Hawaii law (Hawaii Revised Statues) regarding noxious weed control (including "prohibited acts" with respect to designated noxious weeds).