What is the Northern Range of Palm Tree Growth in North America?

I know that on the West Coast, types of Palm Trees can grow (I am not sure if these are natural or just transplanted) as far north as Vancouver, BC, in Canada. I have heard that on the East Coast they occur naturally as far North as North Carolina. I have no idea about central North America.





So my question is what is the northernmost point that Palm Trees grow naturally on the East Coast, West Coast and in the centre of the continent, and what is the northernmost point on the East Coast, West Coast and Central that they can survive in if transplanted?





Lets say with natural conditions, that is, the climate is capable of supporting them without humans watering them, ect.

What is the Northern Range of Palm Tree Growth in North America?
The vast majority of palms live in the tropics. Palms are abundant throughout the tropical regions around the world, and are present in almost every type of habitat in the tropics. Diversity is highest in wet, lowland tropical forests, especially in ecological "hotspots" such as Madagascar, which has more endemic palms than the entire continental Africa. Colombia may have the highest number of palm species in one country [3].





It is estimated that only 130 palm species grow naturally beyond the tropics, most of which grow in the subtropics. The northernmost palm is Chamaerops humilis, which reaches 44°N latitude in southern France where a mediterranean climate makes weather milder than other places as far north. The southernmost palm is the Rhopalostylis sapida, which reaches 44°S on the Chatham Islands where an oceanic climate has a similar warming effect .





So I guess if you found the latitude in North America that basically matches 44 N in southern France, palm trees should grow there as well.


The best info that I could find, is that certain species of palm can grow as far north as Ontario, Canada (N 44° 28' )


I have seen Palms in parts of upper Washington State, and in Maine as well, but whether they're natives or introduced species, I don't know.





I know it doesn't fully answer your question, but it's the best I can do.
Reply:well i know they die here in Wisconsin





appears they can grow as far north as the frost zone