Cultivation Methods and Key Technical Points for Sunflowers
(1) Establish disease-free seed production fields. Strictly prohibit introducing seeds from diseased areas, and do everything possible to protect disease-free areas. (2) Implement a 3-5 year crop rotation with gramineous crops. (3) Select disease-resistant varieties such as Liaokui No. 2, Fenkuiza No. 2, Kang 3A x Hui 6, CM592, etc. (4) For suspected downy mildew, test the sunflower's inner pericarp and...
Annual herbaceous flowering plant, prefers warmth and high temperatures. Robust and requires no special management; strong fertilizer absorption so it can grow in any soil. Cultivation points: Optimum germination temperature: 22-30°C, optimum growing temperature: 15-35°C, planting requirements: sow seeds by dibbling into soil at a depth of about 1CM, germination occurs in about 5-7 days, transplant when seedlings have 4-6 true leaves; seeds can also be dibbled directly into pots. Each 7-inch pot can hold one plant. Cover with soil until the seeds are no longer visible, and water thoroughly. The growing medium is best as fertile sandy loam or loam, with good drainage and sunlight; insufficient sunlight makes flowering difficult. Not suitable for planting in low-lying areas. After transplanting and establishment, fertilization can begin; NPK or various organic fertilizers are all ideal, and earth up around the roots to stabilize the plant and prevent lodging. After flower buds form, water more generously to keep the soil moist.