How to Grow Lettuce Seedlings in Summer? Key Technical Points Explained
Seed treatment: Because the seedling emergence rate is low when growing seedlings in summer, 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 the refrigerator (2°C-5°C) for 2 days, then spread them out in a cool, shady 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...
Seed treatment: Because the seedling emergence rate is low when growing seedlings in summer, 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 the refrigerator (2°C-5°C) for 2 days, then spread them out in a cool, shady 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 g-3.5 g 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 growing seedlings in summer, protect against rain wash 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 all day at night or on cloudy days. In dry weather, water more in the morning and evening; fertilizer can be applied together with watering, and 0.3% monopotassium phosphate can be used for foliar feeding.