Planting Instructions: Plant indoors five weeks prior to your last expected frost date. Sow at a depth of about ¼ inch keeping moist until the seedlings appear. Use as much light as possible, watering as required.
Two weeks prior to transplanting, acclimate the seedlings to the outdoors by moving outside into the shade and then return indoors at night. Expose the plants to more direct sunlight every day. Check moisture regularly. Transplant 16 inches apart in rows spaced 24 inches.
Informational References:- "Descriptions of Types of Principal American Varieties of Cabbage," by Victor Rickman Boswell, USDA Miscellaneous Publication No. 169, March, 1934.