Maine isn’t that much further north than the Hindu Kush.
That didn’t sound right so I looked it up. It’s approximately the same latitudinal range as North and South Carolina. That’s a huge difference on a USDA Zone map so not sure I agree…
Also, hemp is already being farmed outdoors in Maine
…but if it works it works.
Edit: Just realized this was a hemp farm. I think the light cycle requirements are for good flower development, so I’m not really sure this changes my point after all…