How to grow sunflowers?
Annual herbaceous flowers, sexual love warmth and high temperature. Strong does not need special management, strong fat absorption any land can bear. Cultivation points: suitable temperature for germination: 22-30 ℃, suitable temperature for growth: 15-35 ℃, planting requirements: seeds sowed into the soil about 1CM, about 5-7 days to germinate, to be transplanted when there are 4-6 leaves, seeds can also be sowed directly in the basin. One plant can be planted in each 7-inch basin. Cover the soil to the point where you can't see the seeds, and water them thoroughly. The quality of cultivated soil is fertile sandy loam or loam, drainage and sunshine are good, and it is not easy to blossom without sunshine. It is not suitable to plant in low-lying land. Fertilizers can be applied after planting. The three elements or all kinds of organic fertilizers are ideal, and the soil should be cultivated in the root to prevent lodging. After the formation of flower buds, it is appropriate to water more to keep the soil moist.
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How to cultivate sunflowers
Annual herbaceous flowers, sexual love warmth and high temperature. Strong does not need special management, strong fat absorption any land can bear. Cultivation points: suitable temperature for germination: 22-30 ℃, suitable temperature for growth: 15-35 ℃, planting requirements: seed sowing deep into the soil about 1CM, after about 5-7 days to germinate, waiting for 4-6 leaves to move.
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Prevention and control of sunflower downy mildew
(1) to establish disease-free farming. It is strictly forbidden to introduce species from disease areas and do everything possible to protect disease-free areas. (2) rotation with Gramineae crops for 3-5 years. (3) selecting resistant varieties such as Liaokui 2, Fenkuiza 2, Kang3A × Hui6, CM592 and so on. (4) those suspected of downy mildew should detect the endocarp and endocarp of sunflower.
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