Why not? Bananas have been grown commercially in Iceland, which misses the arctic circle by a whisker.
That, my friend, doesn't even pass the smell test. That's gonna need a citation or two.
I suppose you could grow them in some kind of greenhouse, but that certainly ain't commercially viable. (Well, maybe on Elon Musk's space colony.)
It never occurred to you that Iceland has a limitless supply of hot water that can be used to heat greenhouses? No I have not read the articles but that would be my guess.
You may have missed the quote I pulled from one of the linked articles:
Despite the fact that Iceland’s climate is not ideal to growing bananas, Iceland probably has Europe‘s largest banana plantation. Located in a greenhouse in the village of Reykir in South Iceland, the Icelandic banana production is managed by the Icelandic Agricultural University. The annual harvest is admittedly quite low, only 500-2,000 kg of annually.
(emphasis mine)
Point being that maybe, theoretically, Iceland
could become a major banana exporter. However, that appears highly unlikely.
In other words, as I wrote earlier, an interesting oddity but nothing more. It appears to be nothing more than an academic research project.
(Besides, I wonder what those hothouse bananas taste like.)
And yes, I know all about geothermal energy. The town I live in has an extensive geothermal network that heats many buildings and melts snow off sidewalks in the winter.