In the process of feeding the camellia, the yellowing of the leaves is often encountered. The author summarizes the following reasons for reference. 1. As the camellia is a flower-seeing plant, some conservationists often only consider applying phosphorus and potash fertilizers, which results in insufficient supply of nitrogen in the plants. The symptoms are often the lighter color of the lower old leaves and gradually turn yellow. Solution: Apply cooked beancake water once a month or use 0.1% urea solution. 2. Camellia is a plant that prefers acidic soils and requires a pH of 5.5 to 6.5. If the soil is too alkaline or lacks trace elements such as iron and sulfur, the chlorophyll in the plant will be incomplete and the new leaf meso will be yellow and white, but the veins Still green, called iron deficiency. Solution: If the yellowing has just occurred, use a ferrous sulfate solution and water it every 2 weeks. If the yellowing is severe, the absorption function of the root system of the plant is greatly reduced at this time, and the spraying method should be adopted for the foliar application. 3. In the rearing process, the cultivation medium has too much water, the basin soil continues to be too wet, and the plant roots have long-term lack of oxygen, causing the leaves to yellow off. 4. In the rearing process, the cultivation medium is too dry, and in the summer when the temperature is high, if the water supply is insufficient or not timely, the yellow leaves may also be caused. 5. Although camellia is an evergreen plant, but from April to May in the long leaf stage, there will be a small amount of yellowish base leaf off, this is a normal metabolism, do not worry.
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