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Open-air broccoli can be planted in two seasons, March and July respectively. If planted in mid-March, it can be harvested in early June. If planted in early July, it can be harvested in mid-September. 1, soil requirements Broccoli does not have high requirements for soil, and prefers sandy soil, especially soil with relatively good air permeability. Before planting, the soil should be composted in advance, and weeds should not be left in the soil after cleaning. The land should be located on the high side and the drainage is convenient. It is best to keep the soil in a semi-humid state, which can enhance the permeability of the soil and make the soil slightly acidic. 2. Illumination temperature Broccoli has a high demand for sunlight, and good direct sunlight can promote the compactness of the flower ball. But when the temperature is too high, you need shading. The general temperature is controlled at 25℃. The best direct sunlight time is about 6 hours, and the temperature should be cool when it exceeds 35℃. 3. Fertilizer and water management requires topdressing once a week after emergence, and topdressing and trimming fertilizer for the second time after the flower heads grow out. Look at the growth twice later, twice if it is not ideal, and once if it is ideal. There is less watering in the early stage, so it is necessary to keep the flower ball moist. It is best to water it directly along the joint between the page and the root.