How does a sunflower reproduce? How to reproduce sunflowers

Loose-tailed sunflower. The tillering power is strong, and dozens of tillers can be planted per cluster with normal growth, and the branches are divided when the temperature rises steadily and the temperature is high in spring. When dividing the ground planted bushes, dig up small bushes from the side of the plants and plant them separately, leaving the mother plant in place.

Bonsai is divided into pots and divided once every 3 years or so. Select the plants with many tillers and grow robustly, remove them from the container, and remove part of the soil. Use a sharp knife to cut the junction from the base, with a minimum of 3 plants per bush.

Pay attention to keep the plant shape intact and beautiful. The wound is coated with grass and wood ash.

Charcoal powder or sulfur.

Powder sterilization. Plant 1 pot per bush and keep it at about 20 square feet.

Seedlings can be sown and raised. When the fruit is ripe, it is harvested, and the pulp is washed to remove the seeds. Soak seeds in 35 warm water for 24-48 hours, then sow seeds. Generally, the seedlings emerge in 40 to 50 days, and the seedlings are 8 10 cm high, and the seedlings grow very slowly.

When propagating the sunflower by cuttings, it is necessary to select the branches with good growth and health and disease-free as cuttings, and also need to prepare loose and fertile soil rich in a variety of nutrients as the cultivation medium, and also need to water according to the dryness and wetness of the soil to promote the vigorous growth of the sunflower.

1. Propagation by cuttings

The best time for propagation is in March to April in spring and July to August in autumn, because the temperature and humidity at this time are the most suitable for the growth of sunflower, which can improve the survival rate of sunflower, but the specific planting time also needs to be adjusted according to the local climate and environment.

2. Branch selection

When propagating sunflower by cuttings, it is necessary to select branches with good growth and health and disease-free as cuttings, and it is also necessary to cut the lower end of the branch into an oblique incision with scissors to increase the absorption area of the plant, and it is also necessary to insert the branches of sunflower into rooting water and soak for 20-25 minutes to promote the rapid rooting and germination of sunflower.

3. Soil conditions

Sunflower is suitable for growing in loose and fertile soil, when propagating sunflower by cuttings, it is necessary to prepare humus soil rich in a variety of nutrients and good drainage and air permeability, and it is also necessary to water the soil once to keep the soil moist, and then the treated sunflower branches can be inserted into the soil.

4. Maintenance method

Daily maintenance of sunflower, need to be watered according to the degree of dryness and wetness of the soil, keep it moist and slightly moist, to avoid poor growth of sunflower, but also need to spray water on the leaves of sunflower when the weather is too hot, reduce the temperature of the environment, but also need to regularly spray potassium dihydrogen phosphate on the leaves of sunflower to make its leaves more green.

Sunflower is an evergreen shrub or small tree that grows in clumps. Lack of sufficient nutrients during the growth process, some parts of the sunflower are underdeveloped, the color of the new leaves fades from uniform dark green to yellow, the growth rate of the plant slows down, the old leaves fade from green to bronze or orange, and even the leaves are curled, but the petiole still maintains normal growth, and with the aggravation of nutrient deficiency, the entire crown fades, and the growth of the plant is hindered or even dies. There is also a reason for this, which is caused by leaf blight of sunflower, which is a common disease caused by fungal infection, which has a great impact on the growth of sunflower.

Suggestion: It is recommended to regularly use the moon plant of Shiling Fang to spray the leaves, the nutrient absorption is faster, so that the nutrients of the sunflower are sufficient, and the leaf blight of the sunflower can be repaired, which can remove the harmful bacteria, so that the leaves of the sunflower will no longer be yellow and dry up.

Cultivation method, when cultivating sunflower, humus, peat soil and perlite can be mixed into a substrate for cultivation; Light temperature management, the room temperature needs to be stabilized between 20 35, and 50% shade needs to be shaded in spring, summer and autumn; Water and fertilizer management, the temperature is high in summer, the amount of watering can be increased appropriately, and the well-decomposed liquid fertilizer can be applied every 1 2 weeks to supplement nutrition.

Sunflower is suitable for growing in the soil with rich organic matter content, deep soil layer and strong drainage performance, when carrying out pot culture, it can be mixed with humus, peat soil and perlite to make a substrate for cultivation, and after the soil is completed, it is necessary to mix an appropriate amount of well-decomposed organic fertilizer into the soil to improve the fertility of the soil.

Sunflower is a common tropical plant, suitable for growing in a warm environment, during daily maintenance, the room temperature needs to be stabilized between 20 35, and shade measures need to be taken in summer to avoid strong light exposure. A short period of exposure to the sun in summer will also cause the leaves to wither and turn yellow. In spring, summer and autumn, it is necessary to shade 50%, and in winter, it is necessary to do a good job of keeping warm and anti-freezing.

When watering sunflower daily, the amount of watering needs to be adjusted according to the change of the season, and the temperature is higher in summer and the air is drier, so the amount of watering can be increased appropriately. In the winter low temperature season, the amount of watering should be controlled. You can choose to water clean and purified water, and apply well-rotted liquid fertilizer and compound fertilizer every 1 2 weeks to make the plant grow more vigorously.

Loose tail sunflower is suitable for growing in a ventilated and breathable environment, the growth environment is too closed, it will be easy to make the loose tail sunflower infected with white whitefly and other pests, and the leaves will appear yellow leaves and long spots after infection. After discovery, it is necessary to spray the diluted trichlorfon on the leaves, and then transfer it to a ventilated and sunny environment for maintenance.

Propagation is mainly based on dividing propagation, and sowing can also be carried out.

Branching: In April and May, the plant with more tillers is divided into 2 3 plants with a sharp knife, which are potted separately and can become a new plant after 1 2 years of cultivation.

Sowing: When the seeds are ripe, they are harvested and washed, sow them in a wooden trough with fine sand in the shade to moisten them, and transplant them in pots after rooting and budding.

Seedlings can be planted after 2 to 3 years of cultivation. Ground planting selects a semi-yin cluster environment. Potted with humus soil, add a small amount of coarse sand.

Repot once a year in early spring and early summer, and old plants can be repotted once every 3 or 4 years in spring. After changing pots, it should be placed in a semi-shaded place with high air humidity. In winter, it is necessary to protect against the cold, enter the house before and after the frost, and give more light during the winter.

Prune 1 time in spring to remove dead plants and leaves, and it can be viewed after 2 to 3 years.

The main pests and diseases are: Loose tail sunflower leaf spike shed spot, Cou's white shield scale, cotton locust, coconut round shield scale, etc.

Prevention and control methods: remove diseased fallen leaves and burn them. During the onset of the disease, spray agents such as Bordeaux liquid or carbendazim.

Spray trichlorfon, malathion, acemethamidophos and other pesticides at the scale nymph stage and cotton locust mite jumping mite stage.