2. Daylighting: Shade 50% in spring, summer and autumn, which can withstand the dark environment, but it is best to move to outdoor lighting regularly for a period of time.
3. Temperature: Cold tolerance is not strong, so it must be placed in a sunny place. When the temperature is below 20℃, the leaves will turn yellow. The overwintering temperature should be kept above 65438 00℃. If it is below 5℃, plants will be frozen and die in winter and spring.
4. Humidity: Sunflowers like humid climate, and the relative temperature of air in the growing environment is required to be 70 ~ 80%. If the relative humidity of the air is too low, the tip of the blade will be dry. Water should be sprayed on the leaves and the surrounding environment 3~4 times a day during the whole growth period to improve the air humidity. But stop watering after dormancy.
5. Watering: keep the basin soil moist in peak season, and spray water on plants frequently in high temperature period in summer to maintain high air humidity, but do not accumulate water in the basin soil. In autumn and winter, it is necessary to control the amount of watering and keep the basin soil dry and wet.
6. Fertilization: A small amount of base fertilizer is applied when the pot is put on, and the peak season is May ~ 10 to provide sufficient fertility. Usually, decomposed liquid fertilizer or compound fertilizer is applied once every 1~2 weeks, with little or no fertilization in autumn and winter.
7. Pruning and shaping: Because solanaceae plants are not resistant to strong pruning, they usually only cut off withered, diseased and torn leaves and remove withered leaf sheaths when pruning. When the blade tip becomes Huang Shi due to dryness and other reasons, you can only trim the blade tip without trimming the whole leaf. Generally, it is usually pruned in winter. When plants enter dormancy or semi-dormancy in winter, thin, diseased, dead and dense branches should be cut off.