Hardy cabbages are a type of vegetable that belong to the Brassica family. They are known for their hardiness and ability to withstand cold temperatures. The two most common types of hardy cabbages are coles and kales. Coles are a type of cabbage with a short stem and a round head, while kales are a type of cabbage with a long stem and a loose head. Both types of hardy cabbages are popular in many dishes and can be cooked or eaten raw.