Zinnia, also known as BBK, Ye Mei and Wuse Mei, is an annual herbaceous flower of Zinnia in Compositae. What are the planting methods of zinnia? How to manage? Zinnia originated in Mexico, which is drought-tolerant, light-loving, shade-tolerant and easy to manage. The suitable growth temperature is 15 to 25℃, and potted plants can also be planted on the balcony, and the south balcony is the best. In summer, the temperature is hot, the growth is slow, the flowers are few, and the autumn is long in bloom. Its culture can be divided into the following points: 1. Seedling raising. The propagation of zinnia is mainly by sowing, mostly in March-April, and the seedlings are in pots or boxes. The seeds germinate above 10, and the temperature is suitable, so they can be sown early and bloom well. It can also be propagated by cutting in summer. 2. Prepare the soil. Zinnia does not have strict requirements on soil, and cultivated soil can be mixed with humus soil, fine sand and garden soil in equal amount to meet the requirements of looseness, ventilation and fertility. 3. Serve food in time. Potted zinnia seedlings can be planted in pots when the height of 4 to 5 true leaves is about 12cm. The cultivated soil in the basin can be filled to 80% to 90% of the basin edge, but watering and fertilization are too full. 4. Strengthen management. Water. After planting in the pot, water it once to keep the pot soil moist and dry. Too much watering can easily lead to too fast growth, affect root growth and poor flowering. Fertilization. In the vigorous growth period, a fertilizer mainly composed of phosphorus and potassium should be applied once every 10 day to inhibit nitrogen fertilizer, prevent overgrowth and shading, and promote plants to flourish. Sparse the seedlings and pick the heart. In the pot, if the sowing is too dense, it is necessary to sow at intervals to prevent the emergence of high seedlings. Seedling height 12cm, to promote branching and repeated coring, to promote plant compactness and dwarfing, to increase nutrient accumulation, to increase flower bud differentiation and to improve flower quality. Darken. Zinnia likes warm and sufficient light, 16 to 28 grow well. It is best to maintain it in Nanyang station with good ventilation and lighting. Although the planting method of zinnia is important, the management after planting is also very important, which needs careful care to grow better.