What is Winter Cabbage ?

"Put" means "unripe." Other than Putbaechu, "put" is used as a prefix for green pepper (put gochu) and green apples (put sagwa).
Therefore, putbaechu means "young chinese cabbage". It is white-yellowish, and more tender than the fully grown cabbage.
Nutrition/Health Info
Winter cabbages are rich in Vitamin C, and helps prevent colds.