What to Do When Camellia Leaves Turn Yellow? Latest Cause Analysis and Solutions
Camellia is one of China's top ten famous flowers, and it is now a cultivated subject of many garden plants. Camellias can be seen in all major flower shops. With bright crimson flowers and a great many petals, with dozens of petals on a single flower, it has attracted many flower lovers to grow and cultivate it. So what should you do when you encounter yellowing leaves during cultivation? Below, Shuaishuai will explain the causes of yellowing camellia leaves and the solutions!
1. Normal yellowing
Camellia is an evergreen plant. Generally, its leaves can remain for about 3 years without falling, but any green plant will certainly shed leaves. Between April and May, some of the old leaves on the camellia slowly turn yellow and then fall. This is the effect of the plant's normal metabolism and will not affect the plant, so if this is the case, there is no need to worry at all.
2. Lack of growth elements
When growing camellias, leaves may turn yellow due to a lack of trace elements. For example, if the plant lacks nitrogen, the leaves will turn yellow. Once this happens, fertilizer must be supplemented. Every month, apply decomposed bean cake water to the soil once, or add a 1% ferrous sulfate solution. In this way, the trace elements lacking in the camellia can be supplemented.
3. Soil problems
Sometimes soil problems may also cause camellia leaves to turn yellow. Problems with the soil's pH and soil nutrients will affect the plant's growth. Like most plants, camellia also prefers a slightly acidic soil environment, so it is very possible that the soil environment in the grower's area is unsuitable. For example, if friends in the north grow it, the soil in the north is slightly alkaline, which will cause the leaves to turn yellow. In addition, not changing the soil for a long time will cause the soil to lose fertility, so it is best to change the soil regularly. Soil rich in humus is a better choice. You can spray foliar fertilizer on the camellia, which can alleviate the yellowing of the leaves and inhibit the degree and speed of yellowing.
4. Watering problems
If the soil remains too dry or too wet for a long time, the plant's root system will have difficulty breathing and the leaves will turn yellow. Root rot will affect the leaves' nutrient absorption. We should water the plant properly on a regular basis. Before watering, first observe whether it lacks water. If the soil looks whitish, that indicates a state of water shortage.
5. Pest and disease problems
During cultivation, camellias will inevitably suffer from pests and diseases. For example, red spiders and scale insects both suck the sap and nutrients from the leaves, causing the leaves to turn yellow, and in severe cases causing the leaves to fall off. We can buy the corresponding insecticides on the market. If the damage is caused by red spiders, a 50% parathion solution can be used for spraying to kill them. If the damage is caused by scale insects, a specialized pesticide can be used for spraying to kill them, and prevention and control measures should be done well.
The above are the causes of yellowing camellia leaves and the solutions. The most likely causes of yellowing camellia leaves are nutrient deficiency and pest and disease damage. Usually, we should observe the changes on the leaves more often. If the leaves have wormholes or traces of being chewed, they have probably been infected by pests, so we should learn how to judge the causes of leaf yellowing and finally treat the problem accordingly.