According to Gemini, lots of untrue things are true.
More useful to look at https://upload.wikimedia.org/wikipedia/commons/a/a7/World_Ha... and see if that makes more sense, although seemingly it's changing a bit and that graphic is quite old by now (2012). A plant's survival depends on more than just its hardiness and what zone it's in of course, but it's a useful starting point.
What am I looking at? Switzerland is just a black line mess. The average temperature is lower in Fribourg and you can confirm by looking at actual historical data, which is what Gemini did—correctly.
According to Gemini, lots of untrue things are true.
More useful to look at https://upload.wikimedia.org/wikipedia/commons/a/a7/World_Ha... and see if that makes more sense, although seemingly it's changing a bit and that graphic is quite old by now (2012). A plant's survival depends on more than just its hardiness and what zone it's in of course, but it's a useful starting point.