1. Land preparation and bordering: The soil is plowed deeply and blanched, and sufficient base fertilizer is applied. The base fertilizer is generally 1000 to 1500 kilograms of decomposed organic fertilizer and 5 to 10 kilograms of potassium chloride per 667 square meters; or 750 kilograms of chicken manure and 20 kilograms of compound fertilizer. The border is generally 1.6 to 1.7 meters wide, 20 to 30 centimeters high, and has a turtle-back shape.

2. Sowing at the right time: early-maturing varieties are suitable for cultivation from April to August, medium-maturing varieties are suitable for cultivation from September to October, and late-maturing varieties are suitable for cultivation from November to March of the following year. Early and mid-maturing varieties are mainly grown by direct seeding, while late-maturing varieties are mainly grown by transplanting. Early and mid-maturing varieties should not be sown late, otherwise they will cause rapid budding and bolting, small hearts, low yields, or even failure.