What problems should be paid attention to when planting coriander in the open air?

It is necessary to choose coriander varieties with high yield, high resistance, good quality and strong fragrance that are suitable for local open field cultivation and planting. Early-maturing, high-yielding small-leaved coriander varieties can be used. Choose sandy soil plots that are easy to drain and irrigate, moisturize and fertilize. Rational use of fertilizers. Water more. Wait a minute.

The planting method of spring coriander is the key to prevent sprouting.

Because it is easy to sprout coriander in spring, the temperature is still relatively low in the early stage of coriander growth, but the sunshine changes from short to long, which is conducive to the reproductive growth of coriander and the flowering of coriander.

Planting coriander in spring needs to be paid attention to: how much fertilizer to apply. Coriander after emergence is less fertilized.

Therefore, it is necessary to reapply the base fertilizer. 2000 3000 kg of farm fertilizer needs to be applied per mu. It can also be used in combination with some chemical fertilizers, such as diammonium phosphate, potassium sulfate, etc.

For soil requirements. Coriander growth is not very demanding on the soil, but a higher organic matter content can be more conducive to the growth of coriander.

The coriander, if you want to safely overwinter is very easy, cover the coriander directly with plastic sheeting, and cover the corn stalk or straw curtain at night and other things, it will not only not rot, but also grow slowly in the ground, which can keep it fresh My grandmother's according to her own consistent experience, told me that coriander is also relatively cold-resistant, and it can be safely winterized above minus 3-5 degrees.

<> If you want to take root again, water once when there are 5-6 leaves. Before freezing, wind barriers or ground cover are set up in some areas to make it safe to overwinter and harvest early. When the soil freezes at night and is isolated during the day, the frozen water is immediately filled, and the ternary compound fertilizer is applied along the water.

Or diammonium 10-15 kg, cold, with a large area of planting coriander, have to be fixed with an iron frame, and then covered with plastic film, during the day there is sunlight can be directly like this, if it is at night also have to cover a long period of low temperature and high humidity will inhibit the formation and growth of vegetable roots, in this period, try to avoid watering. Severe water shortage of greenhouse vegetables, should be harvested and sold best to build a shed, you can use bamboo.

Build a bow-shaped shed with plastic film.

When the weather is too cold, it can be covered with a layer of straw. In this way, you can grow all the time without being afraid of frost to stop growing and purple leaves, and you can't let the temperature in the shed be too high, and you have to take a small amount of water at noon when the weather is good.

method. In addition, if the soil moisture is large, it is necessary to remove the film and loosen the soil in time, and cooperate with the measures of supplemental foliar fertilizer to increase the layer of grass fence insulation. If it is planted in a small area only for your own consumption, then directly cover the coriander with a layer of plastic film, and press the grass around it to make a curtain cover, and if there is no condition, use the kind with more branches and forks, and put it on the coriander ground.

Be careful not to overwhelm the coriander, and then cover the large branches with dry straw to keep warm and not crush the coriander and hinder its growth. On top of the parsley. Four corner ends.

Pressed with earth to prevent strong winds.

Run, blow away has no effect, but also ensure that it can.

The most common cold-proof measure is to sprinkle plant ash, plant ash contains more potassium elements, as well as a variety of trace elements, etc., before the arrival of the cold snap, the plant ash is evenly sprinkled on the roots of coriander, plant ash can be used alone, can also be mixed with sawdust and plant ash, grass ash and wheat bran, rice bran mix, etc., has an obvious auxiliary heat preservation effect.

Coriander can be covered with mulch, which will maintain the temperature and also allow moisture to form, so that it will not freeze to death. There is also the construction of a greenhouse on the outside so that you can survive the winter.

You can give some potassium to the coriander in the winter, so that it can be safe to overwinter. You can cover the coriander with plastic film, which can be very frost-resistant and cold-proof.

Hello, under normal circumstances, the climatic conditions in early spring and late autumn are more suitable for the growth of coriander, and the normal planting time of coriander is generally in March and April in spring and September in autumn.

How to grow coriander.

1. Land selection and land preparation.

Coriander is a more picky place of vegetables, it has a bit strict requirements for the growth environment, in the selection of land is to pay attention to the selection of plots containing organic matter, while the soil should be more fertile and moisturizing, fertilizer retention capacity is good, it is best to drain and drain the irrigation system of good flat land. When preparing the land, plough as deep as possible, and apply the base fertilizer, which is generally farmhouse fertilizer or fertile leaf microbial agent.

2. Sow seeds and raise seedlings.

Before sowing, the seeds should be treated, first of all, the outer layer of coriander seeds should be rubbed off, and then soaked in water for a day, then wrapped in a damp cotton cloth after fishing, and finally placed in an environment suitable for seed germination for germination, about seven to ten days later, the buds are basically complete.

3. Field management.

There will be a long period of time after sowing and watering do not need to be watered, generally wait until after planting and then water for the first time, after this watering, it is generally necessary to water once every seven to ten days, the early stage of coriander growth generally does not need to be watered, in the middle of the year to ensure that the soil is moist, generally the dance is watered once every seven days, and it is good to water once in more than ten days in the later stage. In the growth period of coriander, generally speaking, if the base fertilizer is applied enough, there is no need for top dressing, if it is found that less than half of the nutrients in the soil are topdressed, a little urea or phosphate fertilizer is applied.

There will be a long period of time after sowing and watering, and there is no need for He Fang to water, generally wait until after planting and then watering for the first time, after this watering, it is generally necessary to water once every seven to ten days, and the early stage of coriander growth generally does not need how to water, and in the middle of the day, it is necessary to bridge the bridge to ensure that the soil is moist, generally the dance is watered once every seven days, and it is good to water once in more than ten days in the later stage. In the growth period of coriander, generally speaking, if the base fertilizer is applied enough, there is no need for top dressing, if it is found that less than half of the nutrients in the soil are topdressed, a little urea or phosphate fertilizer is applied.

Coriander. 4. Disease prevention.

Coriander is generally not disease-free, but there are relatively more pests, so it is necessary to take pest precautions. Generally, we use emamectin benzoate and vegetable suspensions for prophylaxis, spraying every five to seven days.

Planting coriander is not good for seedlings, which is a bit tricky, of course, it can be planted now, but it is not the best time, in order to better ensure the emergence of seedlings, the time can be the hottest mid-July.

The reason why coriander is difficult to emerge is because its seeds are relatively hard, absorb water too slowly, if the planting amount is not large, the seeds can be soaked in advance to destroy the buds, this method is larger, suitable for family cabbage balls, if the planting area is relatively large, it needs to be carried out step by step.

1. Land preparation:Ground fertilization, you can choose to mix farm soil miscellaneous fertilizer with urea or compound fertilizer, no matter what you plant, this is the best fertilization method, long-acting fertilizer and fast-acting fertilizer can meet the nutrient needs of vegetables at different growth stages. After turning 20 cm deep, the rake is raked into a small furrow and waited for sowing.

2 planting:Rub the purchased seeds in half to remove impurities and add them to fine soil, because the coriander seeds are too small to be sown. There are also many people who use the method of hand sowing, even the soil with seeds into the furrow, and then use a rake to go through it, in fact, the small vegetable seeds are used this method of sowing.

3 watering:After sowing, you can dry for three days to increase the ground temperature, choose the hottest time at noon to water, this is because the coriander seeds are easy to burst by the cold water at high temperatures, so that they can emerge faster and more completely, not only coriander, leek seeds are also relatively hard, and such planting methods are also used in rural areas.

4. Seedlings:After watering, about 7 to 10 days, the coriander will sprout one after another, very small, very fragile, but the growth is very fast, and small cabbage leaves will grow in a few days. If it is uneven, it can be planted in a timely manner, and the coriander planting should not be too dense, because its growth space is relatively large, and it grows faster after the beginning of autumn.

5 Harvest:Coriander likes to be cool, can be harvested in 40 days, and can grow to more than 20 cm in 50 to 70 days if you pursue yield. The coriander in our north grows very tall, and it can grow until the frost falls, and it is bundled into a large bundle under the roots, and professional growers can store it in cold storage for storage, and sell it at a good price for the New Year.

Summary:Coriander planting requires intensive cultivation and patient management, and the best time for open-air planting is around mid-July, and the coriander that grows after the beginning of autumn has a pure taste and is an excellent seasoning.

Coriander can be sown in the open field in late March in the Yangtze River basin, and it is more reasonable to start sowing in September in autumn. Now it can be sown at the end of February, but it should be covered with film. Coriander seeds are relatively large, can be crushed in a bottle and divided into two, soaked in warm water for a few hours, evenly spread, and covered with fine soil.

It can be planted, terrace coriander can be planted in May and June, the weather is warm, the sun is abundant, the rainfall is good, the soil is fertile, and the temperature is suitable.

It is generally grown in September and October, and coriander is indeed very delicious, and there are many people who like to eat it

In order to better ensure the emergence of coriander, the hottest time can be selected in mid-July. It's so cold now, you can't plant it.

It is usually planted in September. For example, in Hunan, it can't be planted now, it's too cold to grow.

It is more suitable to plant in March, but now the weather is too cold, and the seeds are easy to freeze to death after sowing, so let's wait for the weather to warm up after the beginning of spring.

Attention should be paid to the soil, and it should be watered frequently, and attention should be paid to pests and diseases, and attention should also be paid to sun bathing, and some pig manure should be used, and branches and leaves should be pruned, etc., these are all things that should be taken care of.

When planting, you should pay attention to the temperature, generally the temperature that cilantro likes is between 15 and 25, and you should also go to loosen the soil, remove all the grass around, not too much water, less exposure to the sun.

When planting coriander, we must control the temperature, choose fertile and loose soil with good air permeability, water regularly, remove pests regularly, properly thin seedlings, weed, loosen the soil, etc.

First of all, it is necessary to choose the right sowing time, and in the process of seeding, we must do a good job of seedling raising, we must ensure the fertility and drainage of the soil, and then we must do a good job of fertilization and ventilation and loosening the soil.

1. The suitable temperature is indispensable for the growth of coriander, and the normal growth temperature of coriander should be controlled at about 16-20 degrees, so that the temperature can make the coriander develop rapidly. If it is particularly hot in summer, it is necessary to cool the coriander, and the high temperature is very bad for the growth of coriander.

2. Before the coriander seedlings are set, be sure not to water, so that the coriander can be controlled and promoted, which can be beneficial to the seedling roots. After the seedlings are set, you can fertilize the coriander, and you can stabilize the seedlings once after planting, and the watering amount must not drown the seedlings. As the seedlings grow up slowly, the need for coriander to water will also increase, the frequency of watering to coriander should also be increased, the growth period to water the coriander eight times, the interval between the middle should not exceed half a month, when watering five times to the end, the watering frequency from half a month to once a week, at this time to ensure that the moist soil at any time, harvest to control the amount of watering, to water a little shallow.