When sunflower is sown, the breeding method / seed selection of sunflower is very important.

There are two ways of planting sunflowers, which are pot cultivation and nursery cultivation. No matter which way is used, their reproduction methods are more or less the same. Sunflower reproduction methods should be mainly in the way of seeds, so when will sunflowers be sown? Today, the editor will help you popularize science.

When does the sunflower sow

Botanist research shows that sunflowers can be sown in every season of the year, but the growth rate of sunflowers is different in different seasons, so the specific sowing time needs to be determined according to the time spent. So when will sunflowers sow? There are usually the following situations.

1. Sow seeds in spring or autumn

If you use flowers in May, you need to sow between February and March, because it takes 60-70 days for sunflowers to blossom when sown in January-April and September-October.

2. Sowing in summer

If you need flowers in October, you can sow in August; if you sow in May-August and November-December, it will take 70-80 days for sunflowers to blossom. In addition, if you sow seeds in November-December, you need to pay attention to heat preservation measures, because in the cultivation of sunflowers, the most suitable temperature is 18-30 degrees, while the most suitable temperature for sowing is 18-25 degrees.

Propagation methods of Sunflower

After knowing the most suitable time to sow sunflowers, we also need to master the correct breeding method of sunflowers, and the following are the detailed steps of sowing, which need to be strictly followed in order to ensure smooth germination after sowing.

1. Select seeds

There are many varieties of sunflowers, so you need to determine the varieties before sowing. If it is a potted plant, you can choose small sunflower seeds for ornamental use; if they are planted in flower beds or yards, you can choose edible sunflower seeds.

2. Sowing seeds

Although sunflowers can be sown all year round, the best time is in April, when the temperature is about 20 degrees, which is the most suitable temperature for seed development. Generally speaking, after the seeds are buried in the soil, the budding time is 5-7 days, and they can be transplanted in about 8 days.

3. Transplant

After the sunflower sprouts, it will protrude the soil surface, if the cotyledons open, it can be transplanted into a large basin, it should be noted that the transplant needs proper watering, and ensure that it has enough light.

4. Maintenance

After transplantation, the sunflower enters the growth period. When it grows 4 pairs of leaves, it needs to be fertilized. How to fertilize the sunflower? It needs to be determined according to its growth stage, such as spraying potassium dihydrogen phosphate on the leaves every few days, which can promote its growth.

Conclusion: the propagation method of sunflower is mainly seed, because it has strong adaptability, so it can be sowed all the year round, if it is pot appreciation, then it is best to sow in April; if it is planted in the nursery, it is necessary to determine the sowing time according to the time spent.

When do sunflowers bloom? habits and planting methods of dwarf sunflowers

Dwarf sunflowers as ornamental flowers, generally plant height of 40 cm, disk diameter of 30 cm, and those 1 to 3 meters high sunflowers are mostly cash crops. So what is the planting method of short sunflowers? In general, when do sunflowers blossom?

The habits of dwarf sunflowers:

Sunflower introduced from abroad, suitable for flower bed planting, generally plant height 40 cm, disk diameter 10-17 cm, main stem flowering, strong adaptability, generally adopted seedling transplanting, seedling age 25-30 days, plant row spacing 40 × 60 cm, can also be potted ornamental, family indoor four seasons can be sown, can be planted everywhere.

Planting methods of dwarf sunflowers:

1. Seed selection: it is recommended to choose the big smile variety of dwarf sunflower, which has a plant height of 30 to 40 cm, a flower diameter of 10 to 17 cm, a bright golden single petal and a black flower heart. It can blossom 50 to 55 days after planting, which is suitable for potted plants and flower beds.

2. Sowing: the seedlings are sowed and propagated, usually in April. The optimum temperature for germination is 15 to 18 ℃, which can be sowed in shallow pots or shallow boxes, with loose media, good water retention, asepsis and so on. Sowing on demand is appropriate, sowing 2 grains per hole, covering 1 to 2 cm thick medium after sowing, in order to maintain the humidity needed for germination, increase the stability of seedling stage and reduce the occurrence of shelled seedlings.

3. Cultivation: keep the soil moist when you first plant it. Don't pour too much water after emergence, or the roots will rot. Be careful when watering. When the weather is hot, water it earlier in the morning and later in the evening. After emergence, leave two or three seedlings, more is not conducive to growth.

4. lighting: dwarf sunflowers like the sun, remember to keep enough light, more than 8 hours a day is better! Attention should be paid to the application of sufficient base fertilizer, mainly phosphorus and potassium fertilizer, and light nitrogen fertilizer.

5. Planting and maintenance: when the seedlings come out one after another, one plant is left in each hole, and the seedling height is 7 to 8 cm. The basin soil should be sandy soil which is rich in humus and well drained. When planting, apply sufficient basal fertilizer to the bottom of the basin, and dig up the seedlings with more soil and less root damage, so as to make the plant recover quickly.

6. Fertilization: fertilizing once every 20 days during the growing period, but applying dilute phosphorus and potassium fertilizer 2 or 3 times before flowering. Always keep the soil moist, especially when it is hot and dry in summer. In order to make the terminal bud of the main branch grow and develop healthily, the lateral (axillary) bud can be removed.

When does the sunflower bloom:

Usually, sunflowers are sown in April, flowering from July to August, and seed maturity from August to September. In fact, sunflowers can blossom all the year round, and the secret is "accumulated temperature". That is, in the process of plant growth, as long as a certain temperature is accumulated, the plant can blossom.

It usually takes 6-9 days for a disk to open from a ligulate flower to a tubular flower. The inflorescence is in full bloom from the second day to the fifth day. The number of flowers in these four days accounted for about 75% of the number of flowers. Most of the flowers bloom from 4 to 6 o'clock in the morning, and the next morning they are pollinated and fertilized. Unfertilized branches can remain intact for 7 or 10 days. The seed setting rate of self-pollination of sunflower is very low, only about 3%, while the seed setting rate of cross-pollination is high.

The above is about the breeding methods of dwarf sunflowers and the introduction of flowering time of sunflowers. I hope the above content will be helpful for everyone to understand and understand the culture methods of dwarf sunflowers.

When does the sunflower bloom (a few months) how does the sunflower spread its seeds

Most sunflowers are taller in shape, with a straight stem and a larger flower at the top. The flowers are generally yellow, and there will be places where sunflower seeds are bred in the middle of the flowers. The leaves are relatively large and green. Many people are not very clear about the time when sunflowers bloom. Let's tell you about it.

When does the sunflower bloom (a few months)

Sunflowers are also called sunflowers. Generally speaking, if sunflowers are sown in April, they will bloom from July to August, and the seeds will mature 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.

How do sunflowers spread their seeds

Sunflower seed transmission is not single, seeds will fall off naturally after maturity, with the help of the wind can float a little farther. Animal feeding can also help sunflowers spread seeds, do not think that animals eat all the seeds are not helpful to the spread, in fact, animals can not eat all the seeds, the feeding process will inadvertently drop a lot of seeds, thus playing a role in transmission.

The planting method of sunflower seeds

1. Sowing time. The most important characteristic of ornamental sunflower is that it does not bear fruit, so there is no great requirement for sowing season. According to its flowering time, it can be sown all year round. Sowing in January-April or September-October, flowering in 60-70 days, sowing in May-August or November-December, flowering in 70-80 days. Of course, there will be differences among varieties, so when selecting seeds, you should pay attention to asking the merchants. The flowering time of most potted varieties is 50 to 60 days. The seeds of ornamental sunflowers are of different sizes. For large seeds, there are 2550 seeds per gram. There are 110 small seeds. It is best to choose small seeds for potted plants, with 5-8 seeds per hole.

2. Sowing method. The seedling soil was mixed with peat, vermiculite and sand at 1:1:2, and a little organic fertilizer was added. To raise seedlings, you can use a hole plate or a nutrition bowl, and families can choose ordinary hole sowing. Dig a small hole of 1 centimeter in the basin, sow the seeds, cover the soil and press it gently. If you can cover the soil surface with a plastic film in winter, the budding time can be shortened. Seedlings usually emerge from 3 to 5 days in summer and from 5 to 10 days in winter.

3. Transplant. Transplant as soon as possible, when the plant grows a pair of true leaves. Transfer the seedlings to the prepared flowerpot, stretch the roots and leave enough room for their growth when transplanting, which can improve the survival rate. When transplanting, the root system should be buried at the same depth to avoid the emergence of tall seedlings.

Management method of sunflower florescence

1. Ensure an adequate supply of water and fertilizer from budding to flowering, which is an important period in the sunflower's life. During this period, the water requirement of the plant accounts for 60% of the whole growing period, and if the water supply is insufficient, it will cause seed dysplasia. Therefore, during this period, to ensure adequate water supply, combined with watering appropriate fertilization, urea plus diammonium once a week.

2. Implement artificial assisted pollination. If the family is growing ornamental sunflowers, this step can be omitted. Under natural conditions, sunflowers are pollinated by insects such as bees. Sunflowers planted in the family can be assisted by artificial pollination in order to improve the pollination rate. Use cotton cloth, cartons, cotton wool to make a powder puff (powder puff shape for makeup can be used directly, but it is more troublesome to pollinate with smaller volume). Prepare the pollen in advance, sprinkle it on the pollination puff and gently press it on the disk. The pollination time was chosen at 9: 12 o'clock, when the dew had just receded and there was more pollen. Pollination usually takes 2 or 3 times.

Sunflower blossoms in summer every year, so don't miss its flowering season if you like it. In fact, there are many ways to spread sunflower seeds, generally human planting is the most common, when planting, you need to understand its growth habits, and then choose an appropriate time to sow.