What is the best time for lettuce?
Seeding time of lettuce seeds
1, spring lettuce: December to March greenhouse nursery, from mid-February to late March open seedlings.
2, summer lettuce: from April to May open ground cultivation in mid-May, from late May to July use shade net cover, live or high-density planting.
3, Autumn Lettuce: From July to September, shade nets are used for cover cultivation and seedling transplanting.
4, winter lettuce: October to November open field nursery.
Lettuce seed processing method
Autumn lettuce is generally cultivated in July or early August. It is a hot and hot season at this moment, and seeds are not easy to germinate. Production often uses low temperature treatment, hormone soaking, red light and other methods to promote germination.
1. Low-temperature treatment is the most commonly used method, that is, first soaking for 12-24 hours, and then packing the seeds in a cool place such as caves, wells, etc., or directly in the refrigerator, adhere to the conditions below 25°C and wet conditions, After 3-4 days, till 80% of the seeds are ready to be cultivated.
2. If hormone soaking is used, seeds can be soaked with 100 mg/L hormone for 3 minutes. After scouring, cultivation can greatly increase the germination rate of lettuce seeds under high temperature conditions. Treatment with 0.1% thiourea also promotes germination.
3, use red light to shine lettuce seeds can also promote the germination at high temperatures, but infrared can inhibit germination.
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