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How to grow sunflowers 1. Seed selection. Prepare sunflower seeds. There are different types of sunflowers. If you want to plant them in pots, you can use small ornamental sunflower seeds. If you plant them in large flower beds or yards, it is recommended to use the edible type. 2. Sowing seeds. The sowing time is recommended to be planted in April, when the temperature is about 20 degrees Celsius, remember to ensure the freshness of the seeds, and avoid mold, bury the seeds in the soil, they can germinate in about 6 days, and they can be transplanted in about 12 days. . 3. Transplant. When the sunflower seeds germinate and emerge from the soil, they can be transplanted into a large pot when the cotyledons are opened. After transplanting, it is necessary to water enough root water, and it must be watered thoroughly. It is recommended to place it in a sunny place indoors. If it is to be placed under the sun, it must be watered frequently. 4. Maintenance. When about 3 to 4 pairs of true leaves grow, spray some potassium dihydrogen phosphate on the leaves every few days to promote plant growth. Sunflowers need to be fertilized during growth. At this time, it must be organic fertilizer after decomposing.