Published on Organic Gardening (http://www.organicgardening.com)
Sow cabbage seed 8 weeks before the last spring frost to 14 weeks before the first fall frost. Seeds sprout in 4 to 10 days at 70° to 80°F. Grow seedlings at 60° to 70°F.
Links:
[1] http://www.organicgardening.com/seed-starting-cabbage
[2] http://www.organicgardening.com/learn-and-grow/cabbage