Lettuce likes cold climate, so the sowing time is generally in spring and autumn, and it can be harvested in February-April and May-June in spring. Sowing can be started at the end of August in autumn and harvested in September-10. However, because different varieties of lettuce have different characteristics, when choosing sowing date, we should first understand the description of lettuce seeds and then sow them in combination with the local climate.
Lettuce planting method
1. Prepare seedbed. It is necessary to loosen the seedbed, level the soil and apply farmyard manure to ensure that the seedbed soil is fine, flat and nutritious, so as to lay a solid foundation for cultivating strong seedlings.
2, soaking seeds to accelerate germination. Accelerating germination before sowing can not only shorten germination time, but also improve germination rate. Put the seeds of lettuce in a wet scarf and soak them in clear water. The soaking time is usually about 3-4 hours, and the water temperature can be kept at room temperature. After the seeds are soaked, gently scrub and dry the water, and then bag them to accelerate germination. When most seeds germinate, you can sow.
3. sow and raise seedlings. Watering the seedbed once before sowing and spraying dimethoate solution can effectively control pests. When sowing, you can use 1 g seeds per square meter, and cover with a layer of fine soil after sowing to create a good growth environment for lettuce. When the seedlings are unearthed, the plastic film should be removed in time and the temperature should be strictly controlled. In addition, moisture is also essential.
4. planting. After one month of seedling age, it can be transplanted and planted. When planting, attention should be paid to stabilizing seedlings, watering in ditches, providing necessary moisture, rational planting and paying attention to density.
5. On-site management. The field management of lettuce is watering, topdressing and weeding every day. Generally, water is poured once every 5-7 days, and topdressing is suitable for trimer compound fertilizers such as nitrogen and phosphorus, and topdressing is not needed in the early stage.
6, pest control. The main diseases and pests of lettuce are powdery mildew and downy mildew. The pests are mainly whiteflies. Therefore, 50% benomyl WP 1000 times solution and 7000 times solution of 40% Fuxing EC can be sprayed for disease control, and dimethoate solution can be sprayed for pest control.