Detailed Explanation of Lettuce Seedling Raising Methods and Technical Points

Seed treatment.

Because the germination rate is low when raising seedlings, the seeds should be given low-temperature treatment. The method is to first soak the seeds for 12 hours, then wrap them well in gauze and place them in a refrigerator (2°C-5°C) for 2 days, then spread them out in a cool, shaded place, and sow only after the seeds crack and sprout.

Sowing.

When sowing, avoid uneven spacing; before sowing, water thoroughly once as a base watering; sow 3-3.5 grams per sq m; cover the ground with a shade net to lower the temperature and retain moisture, and remove it after the seedlings emerge.

Seedbed management.

When raising seedlings, protect against rainstorm washout and high-temperature drought; rainproof seedling raising and shade-net-covered seedling raising can be used. Generally, cover with a shade net from 8 a.m. to 4 p.m. on sunny days, and uncover the net at night or all day on cloudy days. In dry weather, water more in the morning and evening, and topdress fertilizer together with watering.