We grow escarole all winter
This is perfect for fall/over winter here in the Pacific NW. Holds up well in the rain and cold weather. It is such a treat to go out to the garden and cut some escarole for a big, delicious pot of escarole and beans in the middle of winter. I don't even have to cover them in my yard! They survive with little damage and probably taste even better with the cold. Will regrow in the late winter if you cut them leaving about 1/2 inch above the crown.