The sowing date of oil sunflower is long. By adjusting the sowing date of oil sunflower, the flowering date of oil-saving sunflower can be adjusted, so that the high temperature or rainy season can be avoided within 1 days after flowering, and the purpose of avoiding disease and improving seed setting rate can be achieved. The suitable sowing date is in the first or middle of April or from late May to early June. However, we should strive for early sowing, preferably in the first or middle of April. Although the late sowing oil sunflower can mature, there is a certain gap in yield, 1-grain weight and seed setting rate compared with the early sowing oil sunflower. The sowing period of summer sowing is in the middle and late June, and no later than July 1th. 1 mu before ploughing? 1.5 tons of organic fertilizer, 5 kg of urea, 1 kg of phosphate fertilizer and 1? 1.5 kilograms of fine soil or fine sand are mixed and evenly spread on the ground, and 5 kilograms of potassium fertilizer is used. All of them are used as base fertilizer and then plowed after being evenly spread on the ground. Generally, when sowing, 1? 15 kg of diammonium phosphate is used as seed fertilizer. It should be noted that seeds and fertilizers should be separated when fertilizing.