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The flowering period of sunflower in Orson Park in 2022 is from mid-July to the end of August. Usually when sunflower is sown in April, the flowering period is July-August, and the seed maturity is August-September. When a sunflower blooms, it usually takes 6-9 days for a disk to bloom completely from a tongue-shaped flower. Sunflowers bloom from the second day to the fifth day, which is the full flowering period. There are many conversations these days. Sunflowers bloom at 4-6 in the morning and can be pollinated the next morning. Without pollination, these flowers can last for 7- 10 days. The growth period of sunflower refers to the days from emergence to seed maturity, which is generally more than 85- 120 days. Due to different varieties, sowing dates and cultivation conditions, the growth period is also different. The whole growth period of sunflower is divided into four stages: seedling stage, budding stage, flowering stage and maturity stage.