Lettuce is usually planted in spring and autumn, and can be planted all year round if there is a solar greenhouse or sunshade facilities in summer. Before planting lettuce, soil preparation should be done to ensure that the plot is soft and fertile, and suitable pot soil should be prepared for potted plants. After the soil is prepared, directly sprinkle lettuce seeds on the soil surface, cover with thin soil, and spray water to moisturize.

Post-maintenance: Lettuce seeds like the light, so we should bask in the sun more. When the soil is dry, watered in time and the environment is suitable, it will germinate and emerge soon. Interplanting: Lettuce seedlings can be interplanted and transplanted when they grow three real leaves.

Seedling management: water the seedlings frequently, and water them in the morning and evening on sunny days to keep the soil moist. When the seedlings grow 2-3 true leaves, pay attention to even seedlings, weed, and gradually remove the plastic film, so that the seedlings can gradually adapt to the external environment.

Precautions:

Topdressing after field planting for three times, the first time is after slow sowing 15 days, the second time is in the early stage of nodulation, and the third time is in the middle stage of nodulation. The fertilizer is mainly composed of decomposed human animal manure, and can also be combined with a small amount of urea. The concentration of fertilizer should be light first and then thick. Urea can be applied about 10 kg per mu, and potassium dihydrogen phosphate fertilizer can also be sprayed on the leaves. Generally, protective facilities are watered for 5-6 times, and the time and amount of watering should be controlled according to the season, air temperature and ground temperature.

The growth cycle of lettuce is about 100- 120 days, which is suitable for growing in fertile and soft sandy soil with good drainage. When cultivating lettuce, you should choose to sow in March-April every spring, because the temperature at this time can be stabilized above 10 degrees to promote the rapid germination of lettuce.