Where did sweat peas originate from?

Peas can grow anywhere in the US, but only during certain times of the year. They need cool temperatures, but they will die off with a frost. This means that fall and spring are the normal growing seasons for peas. However, in some parts of the US with mild winters, peas will grow during that time period as well. If you can protect peas from the first frost with a rowe cover, they can last as long as the temperature begins to rise again.