Farming The Permafrost | Real Science

Nuuk is located in the warmest part of Greenland, and has averaged below freezing temperatures for all but two of the last 30 years. Obviously you can’t farm in permafrost. They don’t have very many nights in Nuuk above freezing.

...Yet historical records tell us that there was extensive farming in Greenland when the Vikings lived there, during the non-existent Medieval Warm Period​.