Creamy lettuce, also known as hamburger lettuce, coffee lettuce, its leaf color purple with green, more folds, regular consumption can eliminate excess fat, reduce cholesterol, can assist in the treatment of neurasthenia.
<h1>Environmental conditions for the growth of creamy purple lettuce</h1>
Creamy purple lettuce is a semi-hardy vegetable that likes to be cold and avoids high temperatures. The suitable temperature for the germination of creamy lettuce is 15 to 20 ° C, and germination above 30 ° C will be affected. The optimal temperature for growth is 16 ~ 20 ° C, if it is below 0 ° C, it is prone to frost damage. Only sunny creamy lettuce can grow robustly.
Creamy purple lettuce water demand is relatively large, not drought tolerant, the need for nitrogen fertilizer is the most, while phosphate fertilizer and potassium fertilizer can not be less, it is recommended to apply more farm manure containing a variety of elements, the soil is preferably high organic matter content, and loose and fertile loam and sandy loam.
<h1>Causes of autumn sowing of creamy purple lettuce</h1>
As we all know, after the seeds of some vegetables are ripe, they will not germinate for a period of time just after harvesting, although you give the right conditions, or they are not neat after germination, this phenomenon is the seed and "dormancy". In this case, appropriate measures need to be taken to break the dormancy. For example, some vegetable seeds can be dried to keep the seeds in a high temperature dry environment to speed up the post-ripening process of the seeds and break the dormancy; some vegetable seeds can be treated at low temperatures or break the dormancy. There are also some vegetable seeds that can be treated with plant growth hormone to effectively relieve the dormancy of the seeds.
Most lettuce seeds (including creamy lettuce) have a dormancy period, so sowing in the high temperature season requires low temperature treatment.
<h1>Creamy lettuce planting steps</h1>
Creamy purple lettuce can be grown from February to March and from August to November, while in South China it is planted from September to February.
Planting steps:
(1) First soak the seeds in water for 3 to 4 hours to allow the seeds to absorb water, if it is sown in the autumn, it is also necessary to wrap it with wet paper towels and put it in the refrigerator and refrigerator for germination.
(2) After 4 to 5 days, when you see that 70% to 80% of the seeds have exposed white buds, you can prepare to sow. When sowing, mix the seeds with a small amount of fine sand soil, and then spread it evenly, and cover the soil with 0.5 cm after sowing. After sowing in winter, the film should be covered in time, and the seedbed sown in summer should be selected as much as possible in a ventilated and cool place.
(3) After 1 week, the creamy purple lettuce will all break out of the soil, so pay attention to keeping the soil moist.
(4) After 2 weeks, a topdressing should be carried out at the same time as the seedlings.
(5) After 4 weeks, the seedlings can be colonized when they have 5 to 6 true leaves. It is recommended that the row spacing of colonized plants be 20 cm × 15 cm.
(6) After 6 weeks, you have to apply farm manure, and when you see that the leaves of the creamy lettuce are the size of a palm, you can harvest in batches.
<h1>Creamy lettuce harvested and seeded</h1>
Creamy lettuce can be harvested in intervals, by breaking the leaves, or by harvesting them all at once when they reach a certain size.
When keeping seeds, it is necessary to select a more robust and creamy purple lettuce plant with obvious characteristics of this product as a seed plant, let it blossom and bear fruit freely, and pay attention to the planting when leaving seeds, avoiding lettuce, oil wheat vegetables, lettuce and other varieties of vegetables, isolating them, and preventing the phenomenon of hybridization.