What are the suitable flowers in Meitan, Zunyi, Guizhou?

The suitable flower in Meitan, Zunyi, Guizhou is calendula. Meitan county belongs to subtropical humid monsoon climate, with warm and humid summer and dry and cold winter. Spring and autumn are the transitional seasons of winter and summer. The climate is mild all year round.

Calendula likes sunny environment, has strong adaptability, can tolerate low temperature of -9℃ and is afraid of hot weather. Don't choose soil, loose, fertile and slightly acidic soil is the best, which can sow by itself, grow fast and be cold-resistant, so don't choose soil. Resistant to barren and dry soil and cool environment, it grows well in sunny and fertile areas.

Autumn sowing is often carried out after the middle and late September: substrate disinfection disinfects the substrate used for sowing. For tiny seeds that are difficult to pick up by hand or other tools, one end of a toothpick can be dipped in water, and the seeds can be adhered to the surface of the substrate one by one, covering the substrate with a thickness of 1 cm. Then, put the planted flowerpot into the water, and the depth of the water is 1/2 of the height of the flowerpot, so that the water can be sucked up slowly.

The optimum temperature for cutting rooting is 18℃ ~ 25℃, which is lower than 18℃. Cutting is difficult and slow to take root. When the temperature is higher than 25℃, the cuttings are susceptible to bacterial infection and rot. The higher the temperature, the greater the proportion of rot. When low temperature is encountered after cutting, the measures of heat preservation are mainly to wrap the flowerpot or container for cutting with film; When the temperature is too high after cutting, the main measure to reduce the temperature is to shade the cuttings, which should cover 50 ~ 80% of the sun. At the same time, the cuttings are sprayed 3 ~ 5 times a day, with more spraying times in sunny days and less or no spraying times in rainy days.

Spring, summer and autumn all need to be maintained under shade conditions. When the temperature is high (above 25℃ during the day), if the leaves are kept in direct sunlight, the leaves will obviously become smaller, the branches will become shorter, the feet will turn yellow and fall off, and the growth will be very slow or enter a semi-dormant state.

Fusarium wilt and downy mildew often occur, which can be prevented by spraying 500 times of 65% zineb wettable powder.