Only you can be the expert in your local climate and what conditions you can provide in your garden. if you live in a cooler climate, you may have to provide suitable conditions (hothouse, indoor pots etc.) to have much success with some of the plants listed on this site.
I live in a cooler sub-tropical climate and can confirm all of these plants will grow here, and most will do well in warmer areas too. It is a fact of life that the majority of perennial survival plants originate from the tropics/sub-tropics and so do best in those climates.
Having said that, I’ve compiled a list of plants that should do well in cooler areas, and a few more that may do well. In many cases, they might do better if planted as an annual when all chance of frost has passed.
