Napa Cabbage - Purple Express

TO START INDOORS Start seeds 4 to 5 weeks before last spring frost. Sow 1 inch apart in seed starting mix, cover 1/4 inch deep and keep evenly moist. Provide a strong light source until seedlings are ready to plant out. When several inches tall, transplant seedlings 10 inches apart into rich soil in full sun, after gradually acclimating to outdoor conditions.   TO START DIRECTLY OUTDOORS When all danger of frost is over, plant in well-worked, fertile soil in full sun. Sow clusters of 2 to 3 seeds 10 inches apart in rows spaced 1 foot apart. When seedlings are several inches tall, thin to 1 strong plant every 10 inches. In mild winter climates, sow seeds again at midsummer for a fall crop.   GROWING NOTES Purple Express needs full sun and rich, well-drained soil to produce firm, sweet heads. To avoid stunting growth, don’t let seedlings get crowded before thinning or transplanting. Keep weeded and evenly watered. Feed monthly with fish emulsion or an all-purpose fertilizer. Use non-toxic B.T. (Bacillus thuringiensis) for caterpillar pests. Floating row covers provide a good barrier method to exclude pests. Remove covers when heads begin to form.   HARVESTING Cut the whole cabbage at ground level only when these tall, vase-shaped heads are very solid and about 6-8 inches in diameter.