The growth temperature of Corydalis Africana is about 16-24 ℃, 18-24 ℃ from April to October, and 12-16 ℃ from October to April of the next year. High temperature is not conducive to its growth. Generally, the temperature in the daytime should not exceed 30 ℃. The temperature at night in winter should not be lower than 10 ℃, otherwise it is easy to freeze.
Corydalis Africana likes semi shade environment, which is suitable for growing under scattered light. Shade properly in summer to avoid sunburn and keep the leaves green. However, if the indoor light is not enough for a long time, the growth of Corydalis Africana will be slow, do not bloom or grow in vain.
Corydalis Africana is more resistant to humidity and keeps the soil moist. In early spring, the temperature is low and watering should not be too much to avoid stem and leaf rot. In summer, it is generally better to water in the evening. Usually, water more often, and spray water to increase the air humidity of the surrounding environment. Otherwise, the pedicel will droop, and the flowering time will be shortened. When spraying water, try to avoid splashing too much water on the leaves, and wipe them up in time, or the leaves will rot. In autumn and winter, the temperature drops gradually, and the watering decreases properly.
Apply light fertilizer frequently. During the growth of Corydalis Africana, apply fertilizer every 10 days or so. The fertilizer is suitable for thin and rotten liquid fertilizer combined with nitrogen and phosphorus or compound fertilizer. Do not apply too much nitrogen fertilizer. Otherwise, the leaves will be luxuriant and flowers will be less. Generally, the ratio of nitrogen, phosphorus and potassium is 1:1:1.
African Viola likes loose and fertile soil. Generally, it can be prepared by mixing rotten leaf soil with sandy loam, or by mixing rotten leaf soil, peat soil and sandy soil.
Under high temperature and humid climate conditions, African Viola often causes Fusarium wilt, powdery mildew and leaf rot. At this time, 10% antibacterial agents, 401 acetic acid solution and 1000 times liquid can be used to prevent and control by spraying or pouring into basin soil. The insect pests of Corydalis Africana are scale insects and spider, which often occur in the growth period of plants, and can spray 40% Omethoate emulsifiable oil 1000 to prevent insect pests.
