Many of these plants are beautiful, which is why they’re often bought by homeowners and landscapers. While these plants are (sometimes) manageable when contained in someones yard, they can grow out of control in the wild. They can take over the spaces of native plants and become a nuisance for everyone. It can be nearly impossible to contain a plant from spreading once it’s planted in your yard. Without you knowing things like wind and animals can spread the plant’s seeds.
Some of these ‘weeds’ are also sold in stores. Do NOT buy them!!
Why are some introduced plants ‘invasive’ and others not?
“Invasive species are plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration and whose introduction causes or is likely to cause harm.”
All of the plants listed here are found in the nursery trade and score very high in the Hawaii Pacific Weed Risk Assessment. HPWRA is like a background check for plants that gives us an idea of how invasive they can be. Ranking a 6 in the HPWRA means that the plant is very highly to be invasive. The higher the number the more invasive the plant.
If you would like to have a plant assessed by the Hawaii Pacific Weed Risk Assessment click here