Lettuce is a dish in which season and lettuce is a vegetable in what season

Lettuce, commonly known as lettuce, belongs to the Asteraceae family, prefers a shady climate, and is mostly cultivated in spring and autumn. However, with the development of technology, the tree can be cultivated in the greenhouse in winter, and in early summer, the temperature at the top of the mountain is cooler, so it can also be cultivated on the top of the mountain. Therefore, as long as you take reasonable measures, you can basically cultivate it in all seasons.

Because lettuce is very rich in eating and relatively cheap, it is a very common green vegetable in daily family food, and for many people, in most people's concepts, lettuce is a vegetable that can be grown in all seasons, because it can be bought at any time in the supermarket.

But under natural conditions, lettuce is a 1-2 year old herbaceous plant with a production period of 1 to 4 months, so eating lettuce in summer is the most common. Lettuce is very adaptable to the environment and can be cultivated in either spring or autumn; It can also be cultivated over the winter, but it is mainly cultivated in spring and harvested in summer. Lettuce is divided into two types: stem and leaf.

These two are cultivated everywhere and are one of the most important vegetables in spring, autumn and winter, and the best time to eat lettuce is in summer. There is a saying: lettuce eaten in spring is more valuable than **; It can be seen that the nutritional value and health care effect of lettuce are very strong.

In the traditional sense, planting plants is planted in spring and harvested in autumn, and like some warm areas in the south, it can be carried out, secondary planting, and can be harvested twice a year, but now we have mastered some agricultural greenhouse planting technology, so as to create a greenhouse environment, so that in the greenhouse, lettuce, suitable temperature, suitable nutrients, then lettuce can be grown, so, now, we eat lettuce, and some other plants, are available regardless of season, Including watermelons that we often eat, like we know that summer is the season when watermelons are abundant, but now we can also eat sweet big watermelons in winter, in fact, it is the same reason.

Lettuce is a vegetable from January to April. Also known as lettuce, lettuce of the Asteraceae family lettuce species can form a variant of fleshy tender stems, a one- or two-year-old herbaceous plant. Also known as lettuce, lettuce shoots, green shoots, lettuce.

Lettuce is native to the Mediterranean coast and was introduced to China around the 5th century. The above-ground stems are edible, the bark of the stem is white-green, the flesh of the stem is brittle and tender, and the young stems are emerald green, which turn white-green when mature. It mainly eats fleshy tender stems, which can be eaten raw, cold, fried, dried or pickled, and young leaves can also be eaten.

The stems and leaves contain lettuce, and lettuce (C11H14O4 or C22H36O7) is contained inside. It has a bitter taste and has an analgesic effect.

Introduction to lettuce types:

1. Sharp-leaf lettuce.

The plant is tall and tall, with pale green leaves, draped shape, with shallow wrinkles on the page, slightly white powder, and more white powder on the back of the leaves. The bamboo shoots are long and rod-shaped, and the upper part is tapered, about a foot long. It is distributed in central or northern China.

It can be eaten raw or cooked, or pickled. It has strong cold resistance, heat resistance at the seedling stage, and can produce about 8,000 catties per mu in spring and autumn.

2. Green skin lettuce.

Newly bred, early-maturing, heat-resistant, long round leaves, not easy to chaff, and generally resistant to moss. The leaves are 23-30 cm long, obovate, the leaf color is green, the fleshy stem skin is thin, the skin is light and tender greenish-white, and the taste is fragrant.

Lettuce is a seasonal vegetable in spring and summer.

Lettuce can be cultivated in spring and autumn or overwinter, mainly in spring and harvested in summer. Lettuce is a kind of vegetable that is cultivated more in green vegetables, and the first period of lettuce is mainly in April and May, which is the main vegetable to regulate the spring market.

Lettuce is usually planted in early spring every year, and in the summer, there are high-yielding lettuce waiting for the farmer to harvest. Yangtze River Basin.

The lettuce overwinters in the open field, mainly spring lettuce, generally sown in the autumn of the first year in September-October, 40-50 days when the seedlings have 5-6 true leaves.

Planting, it can be safely wintered in winter, and there is enough time to grow after returning to green in the next spring, and high yields can be obtained by harvesting in April and May.

The ripening time of lettuce is related to factors such as climate, variety, and planting method, and generally matures around April in spring. You can also plant out-of-season lettuce in the greenhouse, control the temperature of the environment, and pick it all year round.

The growth of lettuce has high soil requirements, shallow root system, high oxygen requirements, and is most suitable for growing in slightly acidic sandy soil. It is a kind of shady and cold crop, not tolerant to high temperatures, and the plant needs a certain temperature difference to grow, about 20 during the day and about 8 at night.

Sowing time of lettuce seeds

1. Spring lettuce: greenhouse seedlings from December to March, and seedlings in the open field from mid-February to late March.

2. Summer lettuce: cultivated in the open field from April to early to mid-May, covered with shade nets from late May to July, and planted in direct broadcast or high density.

3. Autumn lettuce: From July to September, use shade nets to cover cultivation and transplant seedlings.

4. Overwintering lettuce: seedlings are raised in the open field from October to November.

Planting time.

The planting time of lettuce needs to be formulated according to the local climatic conditions, variety characteristics, facility conditions and the arrangement of planting stubble throughout the year.

Spring lettuce, greenhouse seedlings from December to March, and open field seedlings from mid-February to late March; Summer lettuce is cultivated in the open field from April to mid-May, covered with shade nets from late May to July, and planted with direct seeding or high density; Autumn lettuce, from July to September, use shade net to cover and sow seeds, and seedlings are transplanted; Overwintering lettuce, seedlings in the open field from October to November.

Lettuce in the Yangtze River basin winters in the open field, mainly spring lettuce, generally sown in September to October in the autumn of the first year, 40-50 days when the seedlings have 5-6 true leaves planting, can safely overwinter in winter, there is enough time to grow leaf clusters after returning to green in the next spring, and high yield can be obtained by harvesting in April and May.

Growing environment. 1. Light: Lettuce is a long-day crop with sufficient light.

2. Temperature: Lettuce is a semi-cold-tolerant vegetable, likes cold and cool, slightly frost-resistant, afraid of high temperatures, and grows poorly in hot seasons.

3. Soil: Lettuce is sensitive to the acidity and alkalinity of the soil, and is suitable for planting in slightly acidic soil, and the suitable soil pH value is about one.

4. Moisture: It is extremely sensitive to the water state of the soil surface, and it is necessary to continuously supply water to keep the soil moist. And the amount of fertilizer required is large, and it is suitable to grow in clayey loam or loam soil that is rich in organic matter and retains water and fertilizer. Bika water-soluble fertilizer can be applied to the soil to improve fertility.

A1Spring lettuce is sown in greenhouses from December to March or in the open field from February to March, and harvested in summer. Choosing cold-tolerant and medium- and late-maturing varieties that are not easy to moss is conducive to high yield and high quality.

The amount of seeds per mu of seedbed is 50-100 grams, and about 1 gram of germinated seeds are sown per square meter of seedbed. After the seedlings, keep a spacing of 5 cm, the seedling age is about 30 days, and the seedlings are transplanted when they have 5-6 true leaves, and the density of 5000-6000 plants is appropriate.

2.Summer lettuce is sown in the open field in March and April, cultivated in the shade after late May, and harvested before July. Heat-tolerant varieties are selected, and seeds can also be sown after soaking and germination. When the seedlings are about 25 days old and have 4-5 true leaves, they can be transplanted.

Article **23Autumn lettuce is raised in the shade from July to September, cultivated in the open field, and harvested in autumn. Choose varieties with thick stems, cold and disease resistance.

The temperature in summer and autumn is high, lettuce seeds can not germinate, or germination is difficult, you need to soak the lettuce seeds in clean water for about 2 hours, and then wrap the seeds with a damp cloth and drain the water, put them in 15 20 to promote germination, spray an appropriate amount of water every day, and germinate in 3 5 days. Cover the seedbed with shade nets, reduce the temperature and strong light, and water and sprinkle water frequently to cool down and avoid seedlings from growing.

Article **34Overwintering lettuce is sown in the open field in September-October and harvested after overwintering. Varieties with cold tolerance, high yield, and late budding can be sown directly, or sown after germination. There is no need for shade nets after sowing, but it can be covered with a layer of straw or straw curtain to moisturize the seedlings, and the mulch can be uncovered after the seedlings emerge.

The planting time of lettuce needs to be determined according to the local climatic conditions, variety characteristics, facility conditions and year-round planting schedule. Lettuce in the Yangtze River basin overwinters in the open field, mainly spring lettuce, generally sown in the autumn of the year 9-10 months, 40-50 days when the seedlings have 5-6 true leaves planting, winter can be safely wintered, the next spring after the green has enough time to grow leaf clusters, 4-5 months harvest can obtain high yield.

Lettuce can be sown all year round, spring can be sown in February and March, spring sowing survival rate is the highest, summer needs to be sunscreen with shade nets, in June and July sowing germination is more difficult, autumn should also be sunshaded nets for sun protection, can be sown in August and September, winter needs to control the temperature at about 15, can be sown in October and November.

1. Lettuce can be sown all year round.

When are lettuce sown.

Lettuce can also be called lettuce, is a relatively common vegetable, not only delicious taste and high nutritional value, but many flower friends do not know when lettuce is sown, lettuce can actually be sown all year round, it has strong adaptability to the environment, can be planted well.

Lettuce is sown in spring 2 to 3 months, sowing in spring not only has a high survival rate, but also a fast germination rate, lettuce can also be sown in summer 6 July, you need to use shade nets to protect from the sun, you can also breed in astigmatism, because the temperature in summer is high, so the germination of seeds is very difficult, and may not even germinate.

If lettuce is sown in autumn, it can be sown in August and September, or it needs to be protected from the sun with a shade net, autumn sowing has a higher germination rate than summer sowing, and in winter it can be sown in October and November, in addition to giving it enough sun, the temperature should be controlled at about 15.

The planting time of lettuce varies in different regions and varieties, and generally the Yangtze River basin is planted in the open field, mainly spring lettuce, which is sown in September and October in autumn. In other areas, spring lettuce is generally raised in a small shed from December to March, and transplanted in February and March. The summer lettuce seedling time is from April to May, and the autumn lettuce seedling time is from July to September.

Lettuce planting time, if cultivated in the open field, can be planted at a low temperature of five centimeters of soil for five consecutive days when the average temperature is above 8 degrees, in the northeast, it is generally more suitable to start planting in early April.

Lettuce is more suitable for planting in spring, and planting ten days before the beginning of autumn, that is, sowing in autumn.

Lettuce can be eaten all year round, but the amount of ** in summer is relatively large. Lettuce is an annual or biennial herbaceous plant, and its production period is 1-4 months, and it is generally seen in the summer. Lettuce is adaptable to the environment and can be grown all year round, but it is generally cultivated in spring and harvested in summer.

Lettuce, also known as lettuce, lettuce, green bamboo shoots, lettuce, Asteraceae lettuce lettuce species can form a variant of fleshy tender stems. Lettuce is native to the Mediterranean coast and was introduced to China around the 5th century.

According to the shape of lettuce leaves, it can be divided into two types: pointed leaves and round leaves, and the color of each type is divided into white bamboo shoots (greenish and white), green shoots (light green) and purple bamboo shoots (purple-green) according to the color of the stem.

Lettuce, the upper stem is edible, the stem skin is white-green, the stem flesh is crisp and tender, the young stem is emerald green, and it turns white-green when mature. It mainly eats fleshy tender stems, which can be eaten raw, cold, fried, dried and pickled.

Lettuce is a spring vegetable. Lettuce, also known as lettuce, one or two years of herbaceous plants, also known as stem lettuce, lettuce shoots, green bamboo shoots, lettuce, etc., the production period is 1-4 months, the origin is on the Mediterranean coast, about the fifth century into China. The above-ground stems can be eaten, raw, cold, fried, dried or pickled, and young leaves can also be eaten.

Lettuce is a spring vegetable. Lettuce, also known as lettuce, one or two years of herbaceous plants, also known as stem lettuce, lettuce shoots, green bamboo shoots, lettuce, etc., the production period is 1-4 months, the origin is on the Mediterranean coast, about the fifth century into China. The above-ground stems can be eaten, raw, cold, fried, dried or pickled, and young leaves can also be eaten.