Of course it's better if it's an invasive plant being used, but as is being pointed out, this is a bit more complex since an invasive plant in one area may not be in another, and plants may have their own function in an ecosystem, sometimes functions that we are unaware of. I'm not sure what the real situation is there in Hawaii and in the different areas, I'm just trusting what Norsern_vind is saying to be true, but even if it was otherwise, we still believe growing your own or sustainably harvesting from local plants is the best

This is why here in the Nexus we decided to move away from discussing purchasing of dry plant material, which is often unsustainable (and sometimes mislabelled too! ) and focus on seeds and live plants, as well as offering information on finding and testing local plants for alkaloids of interest.

Relevant FAQ entry

Thanks for bringing this to people's attention, Norsern_vind