What type of agriculture requires the coldest climates?

Tundra agriculture, often referred to as Arctic or polar agriculture, requires the coldest climates. This type of agriculture typically involves the cultivation of hardy crops such as root vegetables and certain grains that can withstand freezing temperatures. Additionally, practices like greenhouse farming may be employed to extend the growing season in these harsh environments. Overall, tundra agriculture adapts to extreme cold, focusing on resilience and sustainability.