Cabbage is a cool season crop that will develop quickly (around 65 days for the smaller headed varieties). So, you can plant it for both Spring and Fall (sow in mid-July for a second crop). Harvest when the head becomes firm.
Varieties
Flat Head: (80 days, 5 lbs) Flat specialty cabbage produces sweet, tender heads with a very short core and less dense interior for easy slicing and shredding.
Katarina: (45 days, 4″-5″) Compact green cabbage bred for smaller spaces. All America Selections Winner.
Red Jewel: (75 days, 3-5lbs) Very early red cabbage. Short core and dense, good sized heads.
Stonehead: (50 days, 2 lbs) Smaller green round heads develop earlier in the season and also hold well in the garden without splitting. All-America Selections winner.