1. Soil: the root system of 12 rolls is shallow, and it doesn't need deep and thick soil. Choose loose nutrient soil to plant.
2. Light: strictly control the light on the plant. When the light is strong in summer, shade properly to prevent the plant from being burned by direct light. In winter, the plant should be placed in a position with enough light to receive the necessary light.
3. Temperature: the requirement of temperature is not strict. It is afraid of cold. It should be placed in a place with sufficient light in winter.
4. Watering: when watering plants, if not well watered, it will cause rotten roots, withered leaves and other symptoms. Keep the soil moist during the growing period. Winter and midsummer belong to half dormancy period, basin soil is most suitable for drying.
5. Fertilization: Twelve rolls do not like fertilizer. They do not require much fertilizer. They only need to be applied once or twice a year.
When the twelve rolls of black spot occur, the leaves will produce black, medium and green spots in the form of water stains. In the early stage of the disease, spray 600 times of 50% thiophanate methyl sulfur suspension, 500 times of 36% thiophanate methyl suspension and 27% alkaline suspension for treatment.
