I’ve never heard of Yerba mate users successfully planting their own crops, but I guess you don’t loose much with trying. You could turn it into a project. If you build some sort of greenhouse then weather shouldn’t be a problem. But there are Southamericans and Syrians everywhere in the world, and therefore also mate everywhere in the world. Your own consumption isn’t going to make a dent in the export of yerba across the world, and, in my opinion, food is the last thing we should stop moving across the planet when fighting global warming. Private jets, unnecessary overseas vacations, useless consumerism, etc are doing much more to warm the planet than yerba exporting. Still, I think it’s cool you’re trying to reduce your carbon footprint. Cheers to that.