How to fertilize sunflower, sunflower fertilization time / fertilizer selection is very important.

In order to make the sunflower grow healthily, in addition to the correct cultivation method of sunflower, fertilization is essential, which should determine the quality of flowers, the life span of sunflower and so on. So how to apply fertilizer is the best? Today we will learn more about the fertilization time of sunflowers and the fertilizers used in different stages.

How to fertilize sunflowers

Because different stages of sunflowers need different nutrients, so the fertilizer applied in different periods is also slightly different, so how to apply fertilizer to sunflowers? First of all, you need to know the correct fertilization time, and secondly, you should know several major fertilizers.

1. Fertilization time of sunflower

In the growing period, sunflowers are usually fertilized once in about 20 days, and 2-3 thin phosphorus and potassium fertilizers should be added before flowering. The specific time of fertilization is determined according to the planting time of sunflowers, and attention should be paid to keeping the soil moist after fertilization.

What kind of fertilizer should be applied to sunflowers

1. Base fertilizer

Variety: mainly with organic fertilizer, supplemented by chemical fertilizer.

Fertilization method: mix fertilizer evenly in the soil before planting seedlings, or dig a 2-3 cm hole around the plant after planting to include fertilizer.

Dosage: 5: 10g organic fertilizer per plant, how to apply fertilizer if it is planted sunflower on a large scale? The amount of organic fertilizer needed per mu is 1000-2000 kg, while that of nitrogen fertilizer is 5-8 kg.

2. Planting fertilizer

Variety: phosphate fertilizer

Fertilization method: within 3-5 days after seed germination, fertilizer is sprinkled on the surface of the potted soil, or within 2-3 cm next to the seed.

3. Topdressing

Varieties: nitrogen fertilizer, potash fertilizer, urea and so on.

Fertilization method: dig a small hole 10-15 cm away from the sunflower, apply fertilizer in the small pit, and be careful not to let the fertilizer come into direct contact with the root system of the sunflower.

4. Foliar fertilizer spraying

After the sunflower budding, we also need to spray fertilizer on the leaf, so how to fertilize the sunflower at this time? Spraying 0.005% zinc, copper, manganese and molybdenum solution on the leaves of sunflowers can promote their flowering, make their flowers brighter and their leaves greener.

Misunderstanding of applying fertilizer to sunflower

1. Pay attention to quantity rather than nutrient content

Some people think that it is OK to fertilize sunflowers as long as the quantity is enough, without paying attention to the content of nutrients it needs. This is a relatively common misunderstanding. When fertilizing sunflowers, we should pay attention to the proportion of nitrogen, phosphorus and potassium in the fertilizer.

2. Fertilizer is sprinkled on the stem of the plant during fertilization.

It is believed that spraying fertilizer on the stem is beneficial for the plant to absorb nutrients, but in fact this is wrong, because the main part of the nutrient absorption of sunflowers is in the root hair area, which may lead to too much fertilizer if sprinkled on the stem step.

3. Apply fertilizer when the sunflower is short of fertilizer.

When we introduced what to do when the sunflower leaves turned yellow, we mentioned that there was a lack of fat yellow, and this situation was actually caused by the misunderstanding of fertilization. many people thought that it was necessary to apply fertilizer only when the sunflower was short of fertilizer, but this would lead to a reduction in its yield.

4. it will have a fertilizer effect immediately after fertilization.

Some people think that there will be fertilizer effect immediately after fertilization, but the absorption of fertilizer by sunflowers will be affected by many factors, such as moisture, temperature and so on.

Conclusion: fertilizing sunflowers is not simply to increase the number and quantity of fertilization, but to pay attention to the nutrient content and the timing of fertilization, just as people need to pay attention to nutritional balance. Sunflowers also need to pay attention to nutritional balance in order to ensure their high yield.

Sunflower watering method how to fertilize sunflower

Many flower growers want to put a sunflower at home, its planting method is very simple, the growth cycle is not very long, so it does not need too much time to take care of it. But the sunflower grows around the sun, so it has a high demand for water. Next, the editor introduces the watering method of sunflowers.

Watering method of sunflower

Sunflowers in the open field

1. When sowing: whether you plant seeds or seedlings, such as soil, water the soil in time to ensure that the soil is moist.

2. From sowing to budding: during this period, it is more tolerant to drought and does not require much water. And the relatively dry environment is beneficial to the growth of roots.

3. Budding stage: control watering. During this period, the plant is tall, the leaves are luxuriant, and the water consumption is large, so it should be watered in time. Especially under the conditions of high temperature and strong light, supplementary watering is needed to prevent the leaves from wilting and affecting the growth. What's more, it is necessary to prevent the plant from being too dry and replenish a lot of water.

Sunflowers cultivated in open field have more developed root system, cold tolerance and relatively less water demand. There is no need for too much watering in spring. with the increase of temperature in summer, water evaporates quickly and supplementary watering is needed.

Second, potted ornamental sunflowers

1. Sowing and transplanting: keep the soil moderately moist at this time. Keep the basin soil moist and provide sufficient water at the seedling stage. If the temperature is above 25 ℃ in summer, it is necessary to increase the amount of water or times of watering.

2. Growth period: watering in time to avoid leaf dehydration and wilting. But do not water too much at one time, the basin soil is too wet will make the leaves yellow. The long-term watering of Jianyinsheng uses the soaking pot method: put the whole flowerpot into a pot full of water, let the water not exceed 2/3 of the flowerpot, soak in the pot for 15-20 minutes, so that the soil is more wet.

Potted sunflowers, with relatively small plants and flowers, do not bear sunflower seeds, and are characterized by a large pot and small size.

How to fertilize sunflowers

1. Base fertilizer

Species: give priority to organic fertilizer and use less chemical fertilizer as much as possible.

Fertilization period and method: families do not need agricultural planting in short, usually mix fertilizer evenly in the soil a few seconds before planting. Or dig a few holes 2-3 cm deep around the plant after planting and apply fertilizer to it.

Fertilizer dosage: 5-10g organic fertilizer per plant, if the plant is larger, the amount can be increased appropriately.

2. Planting fertilizer

Objective: to strengthen the seedlings and apply them in time after the seeds germinate. Mainly choose calcium phosphate to add a small amount of uremia.

Usage: sprinkle fertilizer on the surface of potted soil 3-5 days after seed germination. Or apply 2-3 cm next to the seed. Combine sowing to apply organic fertilizer and chemical fertilizer 2-3 cm under the seed, or 2-3 cm next to the seed.

3. Topdressing

Species: nitrogen fertilizer is the main fertilizer, potash fertilizer is the auxiliary fertilizer. You can choose urea, potassium chloride and other expensive or mature human feces and urine, plant ash and so on.

Time: according to the plant growth, soil conditions, the application of base fertilizer, reasonable topdressing. But topdressing is mainly concentrated in the period from budding to flowering of sunflowers.

Method: fertilize the small pit 10-15 cm away from the sunflower. Pay attention to the depth of fertilization, avoid direct contact with the root system, should be applied in the wet water layer, which is conducive to fertilizer efficiency.

4. Foliar fertilizer spraying

The foliar fertilizer of sunflower is mainly sprayed after budding. Spraying zinc, copper, manganese and molybdenum solution after budding, and spraying nitrogen, phosphorus and potassium solution after flowering can make the flowers bright and bright green.

Management of four growth stages of Sunflower

1. Seedling stage

The stage from emergence to budding is called seedling stage. In this stage, the growth of the aboveground part of the sunflower is relatively slow, and the underground root part grows faster, which is the stage of the strongest drought resistance of the sunflower.

At this stage, water is watered about once a week and fertilized once a month to ensure adequate sunshine.

2. Budding stage

The budding stage is the most exuberant stage in the sunflower's life. During this period, sunflowers need the most fertilizer and water, if this stage can not meet the needs of sunflowers for water and fertilizer, it will seriously affect the yield of sunflowers.

3. Flowering period

Flowering stage means that the disk opens from ligulate flowers to tubular flowers. At this stage, the sowing date of sunflowers should be adjusted, fertilizing and watering should be selected at an appropriate time, diseases and insect pests should be controlled, and bee release or artificial pollination should be adopted to improve the seed setting rate of sunflowers.

4. Mature period

There are differences among different sunflower varieties at this stage. About 15 days after flowering and pollination is the stage of grain formation. During this period, it is best to place it in an environment with clear weather and large diurnal liquid temperature difference and maintain proper soil moisture.

When does the sunflower bloom?

Sunflowers are also called sunflowers. Generally speaking, if sunflowers are sown in April, the flowering period is from July to August, and the seed maturity is from August to September.

However, when raising sunflowers, we can take ways to make them blossom all the year round, which requires accumulated temperature. Basically, plants can blossom when they accumulate a certain temperature in the process of growth.

There are still many varieties of sunflowers, if flower friends only have flowers planted for ornamental purposes, the editor suggests choosing small ornamental sunflowers. However, large varieties can bear seeds and eat, and their seeds have high economic value in the market.

How to fertilize sunflowers

1. Base fertilizer

Species: give priority to organic fertilizer and use less chemical fertilizer as much as possible.

Fertilization period and method: families do not need agricultural planting in short, usually mix fertilizer evenly in the soil a few seconds before planting. Or dig several holes 2cm to 3cm deep around the plant after planting and apply fertilizer to them.

Fertilizer dosage: 5: 10g organic fertilizer per plant, if the plant is larger, the amount can be increased appropriately.

2. Planting fertilizer

The main purpose of applying seed fertilizer is to strengthen seedlings, which should be applied in time after seed germination. Mainly choose calcium phosphate to add a small amount of uremia.

Usage: sprinkle fertilizer on the surface of potted soil 3-5 days after seed germination. Or apply 2 cm to 3 cm next to the seed. Combine sowing to apply organic fertilizer and chemical fertilizer 2-3 cm under the seed, or 2-3 cm next to the seed.

3. Topdressing

Species: nitrogen fertilizer is the main fertilizer, potash fertilizer is the auxiliary fertilizer. You can choose urea, potassium chloride and other expensive or mature human feces and urine, plant ash and so on.

Time: according to the plant growth, soil conditions, the application of base fertilizer, reasonable topdressing. But topdressing is mainly concentrated in the period from budding to flowering of sunflowers.

Methods: fertilize the small pit at a distance of 10-15 cm from the sunflower. Pay attention to the depth of fertilization, avoid direct contact with the root system, should be applied in the wet water layer, which is conducive to fertilizer efficiency.

4. Foliar fertilizer spraying

The foliar fertilizer of sunflower is mainly sprayed after budding. Spraying zinc, copper, manganese and molybdenum solution after budding, and spraying nitrogen, phosphorus and potassium solution after flowering can make the flowers bright and bright green.