2. Seed selection: select healthy and disease-free lettuce seeds, dry them after disinfection, and then mix them with fine sand.
3. Soil: loose, breathable and fertile soil should be selected, and the soil should be disinfected before planting.
4. Planting: Scatter the treated lettuce seeds evenly in the soil, then cover it with a thin layer of soil and water it properly.
Maintenance of lettuce
Temperature: The suitable temperature for lettuce growth is 15~20℃, and the seed germination temperature is 18~22℃. When the outside temperature is higher than 25 degrees Celsius, plant growth will be affected to some extent.
Lighting: Lettuce is suitable for growing in semi-shady places. It needs shade in summer to avoid sunburn, and it can be properly illuminated in winter to promote plant growth.
Watering: Lettuce likes wet growth environment, and the water evaporates quickly in summer, which can increase the number of watering, but it is not advisable to water too much, otherwise it will lead to root rot.
Nutrition: lettuce should be supplemented with nutrition in time during its growth. Pay attention to the concentration of fertilizer should not be too high, and raw fertilizer should not be applied.