Direct seed as soon as soil can be worked or start indoors 6-8 weeks before frost and plant out when plants are 4-6 weeks old. Sow seed .5 cm deep and 8 cm apart. Thin plants to 20-30 inches for early cabbages. You can direct seed in summer for a fall crop. Shallow rooted plants benefit from mulch. Use floating row covers to protect plants if flea beetles are a problem.