Cabbage is a cool season crop that you can grow twice in a year. Some varieties of cabbage, such as Savoy, will take up to 88 days to form heads.If you are wondering when will cabbage make a head, you may simply need to wait longer or your plants may be stressed by improper culture or temperatures.abbage is a cool season crop that you can grow twice in a year. Some varieties of cabbage, such as Savoy, will take up to 88 days to form heads.