FS002 Colorful Sunflower Seed (100 seeds/bag)

Seeds of Colorful Sunflower, 100 seeds per pack. The flowers of this variety of sunflower are rich in colors, with a combination of bright yellow, orange - red, maroon and other colors. Different from the single - colored common sunflower, it is highly ornamental. The plant height is moderate, suitable for courtyard planting, potted plant viewing, and can also be used to create a small flower - sea landscape.

1. Select suitable soil: Colorful sunflowers have strong adaptability, but they prefer loose, fertile and well - drained soil. You can mix garden soil, leaf mold and river sand in a ratio of 3:2:1, or directly use high - quality flower nutrient soil. Put the prepared soil into flowerpots or planting areas, water it thoroughly in advance, and keep the soil in a moist but not waterlogged state.

2. Seed treatment: No special treatment is required, and the seeds can be sown directly. If you want to increase the germination rate, soak the seeds in warm water for 3 - 4 hours to allow the seeds to absorb enough water, and then take them out and dry the surface moisture before sowing.

3. Sowing operation: Evenly sow the seeds on the soil surface. Pay attention to keeping a certain distance between the seeds, about 2 - 3 cm, to avoid overcrowding of seedlings during growth. Then cover the seeds with a thin layer of soil, about 1 - 1.5 cm thick, and gently compact the soil to make the seeds contact the soil closely.

4. Moisture and light preservation: After sowing, use a sprayer to gently spray water to keep the soil moist. Cover a layer of plastic film or sun - shading net above the flowerpot or planting area to keep moisture and provide appropriate shading. Place it in a warm, well - ventilated place with scattered light. The suitable germination temperature is between 18 - 25 degrees Celsius.

5. Management after emergence: Generally, the seeds will emerge in about 3 - 7 days after sowing. After emergence, remove the covering in time and gradually increase the light duration, but avoid direct strong light. Keep the soil moist, following the principle of "watering only when the soil is dry, and watering thoroughly when watering". When the seedlings have 2 - 3 true leaves, thin out the seedlings, remove the weak and over - dense seedlings, and keep the strong seedlings to provide sufficient growth space for them.

a. Temperature influence: The germination of Colorful Sunflower seeds and the growth of seedlings are relatively sensitive to temperature. If the temperature is too low, the seeds germinate slowly or may not germinate at all; if the temperature is too high, it is easy to cause the seedlings to grow spindly and weak. When sowing in early spring or late autumn, appropriate heat - preservation measures should be taken; in high - temperature summer, shading and cooling are required to avoid the excessive temperature from affecting growth.

b. Light management: Although sunflowers are sun - loving plants, in the early stage of seed germination, too strong direct light can damage the seedlings. Gradually increase the light duration after emergence, but in the high - temperature period of summer, especially at noon, appropriate shading is required to avoid strong light burning the seedlings. As the plant grows, the light intensity can be gradually increased to promote the robust growth and flower bud differentiation of the plant.

c. Water control: From sowing to emergence, keep the soil moist, but there should be no waterlogging, otherwise the seeds are easy to rot. After emergence, water the plants reasonably according to the dry - wet condition of the soil. Avoid over - watering, which may cause root hypoxia and rot, and also prevent the soil from being too dry, which will affect the growth of the plants. Generally, water when the soil surface is dry 2 - 3 cm.

d. Fertilization points: In the initial stage of growth, a small amount of thin nitrogen fertilizer can be applied appropriately to promote the growth of the plant's stems and leaves. When the plant enters the budding stage, the application amount of phosphorus - potassium fertilizer, such as potassium dihydrogen phosphate solution, should be increased to promote flower bud differentiation and flower development, and improve the quality and quantity of flowers. When fertilizing, pay attention to applying thin fertilizers frequently to avoid burning the roots with concentrated fertilizers.

e. Pest and disease control: Common pests and diseases of Colorful Sunflower include powdery mildew, black spot, aphids, sunflower moth, etc. Usually, pay attention to keeping the planting environment well - ventilated, and timely clean up diseased and withered leaves to reduce the environment for the breeding of pests and diseases. Regularly check the plants. Once pests and diseases are found, take corresponding control measures in a timely manner. For powdery mildew and black spot, fungicides such as carbendazim and chlorothalonil can be used for spray control; for aphids and sunflower moths, insecticides such as imidacloprid and beta - cyfluthrin can be used for control.