[wussboy]

Have you seen the weather up here?!? For most of this country, growing things indoors in completely artificial environments is the only option. There may be regulatory issues at play, but mainly I would think it’s a climatic necessity.

[Scoundreller]

Indoors is more about solar insolation than climate. Southern Ontario is same latitude as northernmost california.

Check out Leamington Ontario and there are some big greenhouses.

But there’s a part of Spain where the whole city is a greenhouse: check out el ejido.