Lettuce planting method and time: lettuce planting should be carried out from October to December as far as possible to avoid planting in a supercooled or overheated environment. Before planting, we should buy good quality seeds and select varieties with good disease resistance. The germination rate is relatively high. Prepare a suitable seedbed and pour water after disinfection for standby. Mix the sand with seeds and sow them into the soil. Cover the soil and put them in a ventilated environment.
Lettuce is rich in nutrition and contains a lot of nutrients β Carotene, antioxidants, vitamin B1, vitamin B6, vitamin E, vitamin C, as well as a large amount of dietary cellulose and trace elements such as magnesium, phosphorus, calcium and a small amount of iron, copper and zinc. Strengthen the digestion and absorption of protein and fat, improve gastrointestinal blood circulation, and often eat lettuce.
Lettuce likes cold environment. It is neither cold resistant nor heat resistant. The suitable temperature for growth is 15 ℃ - 20 ℃, and the growth period is 90-100 days. The seeds are resistant to low temperature and can germinate at 4 ℃. The suitable temperature for germination is 18-22 ℃, and it hardly germinates when it is higher than 30 ℃. During plant growth, I like cold climate. It is most suitable to grow at 15-20 ℃, with high yield and good quality; When the temperature is higher than 25 ℃, the growth is poor, the leaves are coarse and old, and have a slight bitter taste. But cold resistance is also quite strong. 0 ℃ or even short-term subzero low temperature does not hinder growth.