Seedling raising: Because the offspring of sweet corn seedlings have little variability and can retain the excellent characteristics of the mother plant, it is necessary to choose excellent mother plants with good quality and many fruits, collect mature fruits, peel and remove the pulp, take out the seeds, wash and dry them for preservation. Sow in autumn or spring (hole sowing or row sowing) on the prepared seedbed, the soil is fertile and convenient for irrigation, then cover with 2 ~ 3 cm of sand or fine soil, and then cover with pine needles or grass. Pay attention to keep the soil moist and shade when the light is strong. When the seeds germinate and the seedlings grow to a height of 6 cm, the seedlings are moved into seedling bags or left in seedbeds for growth. If seeds are soaked in warm water at 25 ~ 30℃ for 5 ~ 6 hours before sowing, it will be more conducive to germination.

Transplanting: It is best to start transplanting before germination in spring. Sufficient base fertilizer should be applied when transplanting, especially when planting on barren land. Dig bigger and deeper holes and apply enough organic fertilizer, which is beneficial to promote the rapid expansion of root system and the growth of aboveground parts.

Management: after transplanting, we should pay attention to strengthening management and applying some nitrogen fertilizer and organic fertilizer to promote plant growth.

Sweet corn is resistant to high temperature and likes light. When the light is sufficient, more fruits are produced with good quality. On the contrary, shading leads to less fruits and poor quality. Therefore, the steep long branches, dead branches and dense branches of plants should be trimmed and reshaped every year to ensure ventilation and light transmission of branches and leaves, promote the germination of new branches, and avoid the occurrence of big and small years, which is conducive to stable and high yield and improve quality. Pruning should be done after fruit picking in late spring and before spring bud germination.