How far north can palm trees be found?

It depends what you consider to be a "palm tree." Most people only consider Coconut Palms or Date Palms palm trees. Some people consider yucca plants and bananas to be palm trees. However, neither yuccas nor bananas are palms and there are many more species of palms than Coconuts and Dates. There are palm trees with fan shaped leaves (people often mistake these for yuccas) ranging in height from short and bush-like to towering and those with feather shaped leaves (like the Coconut) which are more ociated with the tropics. True palm species can grow as far from the equator as the British Isles in Europe, British Columbia on the North American west coast, Connecticut on the North American east coast, and Korea on the east coast of East Asia. Most palms in far northern regions are fan-type palms and often do not grow to more than eight to ten feet tall. Some hardy species that can survive in these locations include Sabal minor, Rhapidophyllum hystrix, Trachycarpus fortunei, and Chamerops humulis.