lettuce planting time, four seasons can be planted

Lettuce can be planted in spring, summer and autumn, and lettuce can also be planted in winter in greenhouse, spring sowing is generally carried out from February to April, autumn sowing is carried out from July to August, summer sowing needs to avoid the heat, and the planting time of lettuce varies in different regions and varieties. Loose-leaf lettuce is suitable for spring sowing, autumn lettuce is suitable for winter sowing, cold areas are generally winter sowing, North China can be sown in spring and autumn, and South China should raise seedlings in cold beds from the end of January to the beginning of February.

Planting time of lettuce

1. Divided by season: according to different climates and different varieties of lettuce, the sowing time of lettuce varies. The lettuce planting time is the most, which is divided into spring and autumn, sowing in February-April and July-August respectively. If the greenhouse planting technology is used, it can also be sown in winter, and the temperature of lettuce sowing and sprouting can be mastered.

Lettuce leaves delicate, sowing between 5-10 degrees, and the growth temperature should be controlled at 15-20 degrees, because it likes cold and cool, so to avoid the hot summer planting, cold winter is not suitable to plant lettuce.

2. Distinguish by place: spring sowing is generally used in alpine areas such as northeast and northwest, spring and autumn in the Yangtze River Basin and North China, autumn sowing in South China and spring sowing in Shanghai, the general time should be earlier, and seedlings should be raised in cold beds at the end of January and the beginning of February.

3. According to varieties, loose-leaf lettuce such as cream lettuce is more heat-resistant and can be sown in spring and summer. Western lettuce, which is not heat-resistant, is suitable for sowing in autumn and winter.

II. Matters needing attention in planting

1. Sowing stage

(1) sitting beds: when sowing, the beds should be 1.2m-1.3m and 10cm-12cm high, and drainage ditches should be built to prevent Rain Water from accumulating.

(2) Seedling transplanting: because lettuce seeds are expensive, it is often cultivated by seedling transplantation. in general, seedling transplanting should pay attention to sparse sowing in order to cultivate strong seedlings. When the seedlings grow to 5-8 cm, you can dig holes in the border and plant them. It should be noted that the spacing is about 10-12 cm, and the line spacing is about 20 cm.

(3) Direct seeding: the density of direct seeding is generally controlled at 2-3 seeds per centimeter and covered with 0.3-0.5 cm fine soil. For autumn direct seeding, the seeds need to be soaked for 12 hours, wrapped in wet gauze, treated at a low temperature of 5-6 degrees Celsius for 2 days, and removed when most of the seeds are white. It is high-temperature and rainy in summer and autumn. If you sow seeds at this time, you should pay attention to the use of sunshade nets.

2. Environment and varieties

(1) Environment: 15-20 degrees Celsius is the temperature needed for lettuce growth, and the most suitable soil pH value is 5.56.8C.

(2) varieties: Salinas, Beishan No. 3 and other varieties are better.

3. Field management

(1) after applying fertilizer, the soil should be deeply ploughed and leveled.

(2) about 5 days after sowing, nitrogen can be irrigated and fertilized. when the growth of leaf crown is the best, phosphate fertilizer can be applied to leaves, and fertilization should be stopped two weeks before harvest.

(3) the control of water quantity should be moderate, high temperature weather should be watered every day, and drainage should be carried out in rainy season.

(4) after the lettuce is ripe, it should be harvested in time.