Purple leaf lettuce belongs to loose leaf lettuce in botanical classification. It is an annual or biennial herb of lettuce in Compositae, with leaves as the main edible part, which is suitable for both fresh and cooked food. All localities have arranged sowing and harvesting by stages, achieving annual supply. Purple leaf lettuce has high nutritional value.

Every 100g of fresh food contains protein 1.0 ~ 1.4g, fat 0. 1g, carbohydrate 1.8 ~ 3.2g, crude fiber 0.9g and vitamin A1/kloc. 10.06 mg of calcium, 77 mg, and trace elements needed by human body such as iodine, fluorine and zinc. ?

Purple-leaf lettuce can be planted all year round, preferably from March to April in spring and from late July to late August in autumn. The sowing method is as follows:

1. Seed selection and seedling raising: select the seeds, accelerate germination in advance, sow them on the seedbed and wait for the seedlings to grow.

2. Soil preparation and fertilization: before transplanting, soil preparation and fertilization should be carried out, and the soil should be plowed and refined and fertilized.

3. Transplanting and planting: When the seedlings grow three true leaves, transplant them into the soil and strengthen management after survival.