Cabbage can be harvested nearly all year round as long as the weather stays cool. Plant cabbage in early to mid spring for harvest mid summer onwards. Plant autumn cabbage in late spring for harvest in fall. Plant winter cabbage in late spring for harvest in winter. Plant spring cabbage in summer for harvest next spring. The key is to choose the season in your region where cabbage will grow and come to harvest in cool weather. ( Types of cabbage, click here.)
Planting Calendar. Cabbage is a cool-season crop that requires 70 to 120 days to reach harvest. Cabbage is best grown in temperatures between 25ºF and 80ºF (9º-27ºC), but is frost-hardy to temperatures as low as 20ºF. Cabbage grown in weather that is either too hot or too cold will bolt without forming a head. Weather that is too warm also can cause cabbage to split. Plant cabbage so that it is ready for harvest in cool weather.
● Spring planting. Sow cabbage seed 4 to 6 weeks before the average last frost date. Allow 60 to 90 growing days before temperatures rise consistently above 80ºF (27ºC). Cabbage planted in early spring will be ready for harvest in early summer. In cool regions, cabbage planted in mid spring will be ready for harvest from mid summer onwards.
● Autumn planting. Plant cabbage in mid to late summer for harvest in autumn or winter. Summer planted cabbage must come to harvest in the cool weather of autumn or winter. In mild-winter regions, plant cabbage in autumn or winter for harvest in winter or spring. Cabbage started in mid winter can be grown under a cloche for harvest in early spring. ( Tips on planting autumn and winter vegetables.)
Succession cropping. To ensure a constant supply, sow seed and transplants every three or four weeks or sow seed and set transplants at the same time for a successive harvest. Early and midseason cabbage varieties planted at the same time will mature several weeks apart.
Place. Cabbage grows best in full sun but will tolerate light shade for part of the day.