1、 Prevent fertilizer deficiency

Within half a month after the peony flower withers, the compound fertilizer dominated by phosphorus fertilizer should be applied once, and some farmyard fertilizer through ripening and fermentation can also be applied appropriately. If the plant grows poorly after flowering, 0.2% potassium dihydrogen phosphate solution can also be used for foliar topdressing, which can make the plant flourish and enhance the resistance of the plant to the adverse living environment

2、 Timely watering

Peonies are usually watered once every seven or eight days, in the morning or evening. It is necessary to keep the soil moist, but not too wet, let alone ponding

3、 Pay attention to shade

Peonies like the sun, but they don't like the sun, especially the strong direct light in summer. When the light is strong, it is likely to cause the peony leaves to wilt and turn yellow. When planting, it is necessary to choose the place facing the East and the sun with high terrain. In summer, when the light is strong, it is best to shade at noon. Potted plants should be placed on the sunny East balcony, such as the south balcony or roof platform, and try to shade in the West

4、 Disease prevention

Under the environment of high temperature and humidity, leaf diseases such as peony brown spot and gray mold are most likely to occur. If the disease is found, the disease types shall be identified in time and corresponding measures shall be taken

① Brown spot disease, also known as erythema, often causes early leaf blight and affects the growth of peony. To completely remove the sick and disabled body, spray 50% carbendazim 600 times or 3 degrees of stone sulfur mixture to kill the bacteria on the plant. After the onset of the disease, spray 50% carbendazim 1000 times or 65% mancozeb 500 or 600 times, once every 7 to 10 days, three or four times continuously. The planting density is moderate, and organic fertilizer and compound fertilizer are applied

② Anthrax is more common in Beijing, Nanjing, Shanghai, Wuxi, Zhengzhou, Xi'an and other places. Anthrax often causes the peony leaves to show withered spots, the diseased stems to twist, and the young branches to die. Minimize the source of infection. At the initial stage of the disease, spray 70% anthrax Fumei 500 times solution or 1% lime equivalent Bordeaux solution or 65% mancozeb 500 times solution once every 10 to 15 days, two or three times in total

③ Ring spot disease, also known as white star disease, is a common leaf spot disease of peony. It is more serious in Beijing, Changsha, Zhengzhou, Guiyang and other places. Timely remove the fallen leaves of diseased plants, and spray 3 degrees of stone sulfur mixture before plant germination to kill the bacteria on Peony plants. After the onset of the disease, spray 1% lime equivalent Bordeaux solution or 50% chloramphenicol 800 times solution or 65% mancozeb 500 times solution for two or three consecutive times, once in 10 to 15 days. Prune dead branches and over dense branches and leaves in time to improve ventilation and light transmission conditions

④ Botrytis cinerea can occur in the growing season of peony, which does serious harm to young plants and causes lodging and wilting of seedlings. The dead branches and leaves of diseased plants shall be removed and the diseased remains shall be deeply buried. Once the disease occurs, the following medicaments can be used for spray control: 1% lime equal volume Bordeaux, 70% methyl tobrozine 1000 times liquid and 65% times zinc 500 times liquid, spray once every 10 days to 15 days, and continuously spray two or three times. Drain water in time after the rain, and do not wet the soil at the base of the plant cluster