People in NZ mention using them for cover for frost sensitive plants, for instance, growing tamarillo underneath. Or citrus. I've not heard any reports of longer term feedback, beyond initial plans.
Note that twice I've bought the seeds in New Zealand, and when I went to germinate them, found them to be infested with spider embryos. Opening the seed casing would show a baby spider inside, in place of the seed. And this was the case for most of the seeds. In the end, I bought in seedlings, and have them out in the yard. They've grown rather well, except for the two, which got scythed accidentally. I also loosely plan to plant frost sensitive things under them.
What a wonderful coincidence Rick that you just happened to mention to this New Zealander that was visiting, and he happened to be carrying the seed. New Zealand has very strict importation rules, and I'm very surprised that someone carried seeds into the states or wherever, and just happened to be carrying the one you mentioned

I'd be very cautious if I were you.