Sunflowers bloom in a few months

Sunflowers bloom from July to August every year, and they bloom at 4-6 o'clock in the morning. In addition, the flowering period of sunflower is about two weeks, and it takes 6-9 days from bud to full bloom, of which the duration of full flowering is 3-5 days.

The points for attention in sunflower planting are as follows:

1. Temperature

During the whole growth process, sunflowers can grow normally as long as the temperature is not lower than 10 ℃. In the suitable temperature range, the higher the temperature, the faster the development.

two。 Light

Growing sunflowers needs plenty of sunlight, and it is necessary to keep the sun warm for about ten hours, which is conducive to the better growth of sunflowers and produce full fruit this morning. Do not put sunflowers in cold, wet places during planting, so as not to affect the growth of sunflowers.

3. Watering

The growth time of sunflowers is different, so the water demand is also different, as long as you keep the soil moist, avoid stagnant water in the land during watering, otherwise it may cause the premature death of sunflowers, try to avoid excessive lack of water in the soil, and water ahead of time to ensure that the nutrients of sunflowers will not be disconnected.

4. Fertilizer application

Sunflower absorbs little nutrition at seedling stage, needs the most phosphorus from emergence to disk formation, and absorbs the most potassium from disk formation to seed wax ripening stage. In order to ensure high quality and high yield of sunflower and full kernel, attention should be paid to the application of total fertilizer, mainly phosphorus in the early stage, nitrogen and potassium in the middle and later stage.

5. Pest control

Powdery mildew and black spot are the main diseases that harm the leaves of ornamental sunflower. In addition to spraying with the same amount of Bordeaux solution, the disease can also be controlled by spraying 500 times of 50% topiramine wettable powder at the initial stage of the disease.

Now, in addition to growing sunflowers as cash crops and ornamental potted plants, sunflowers can also be used as cut flowers. generally, the vase life of sunflowers can reach 7-10 days in water antistaling agent, and cut flowers can be stored for about 7 days under 2-5 ℃.