What are the reasons for yellowing and dropping leaves on a Radermachera sinica
Radermachera sinica is a large foliage potted plant, generally grown indoors, but mostly in home and office environments, it can absorb harmful substances from the air and has a radiation-protection effect. However, during care, its leaves often turn yellow and drop, and in severe cases this can lead to death, greatly reducing its ornamental value. So what causes this? Let's find out together.
1. Too much water
Radermachera sinica likes moisture but hates waterlogging. In high-temperature seasons, evaporation is greater and the demand for water is higher. If the soil is too clayey or the drainage holes are blocked, the soil stays too wet for a long time after watering, and the roots will suffocate due to insufficient oxygen supply, causing poorer root absorption. When nutrient and oxygen supply is insufficient, leaf yellowing occurs. Therefore, in high-temperature seasons, pay attention to watering and keep the soil moist. If the soil is clayey, replace the soil and repot in time. Avoid long-term water accumulation and loosen the soil in a timely manner to maintain good permeability.
2. Too low temperature
The suitable growth temperature for Radermachera sinica is 20-30 degrees. It tolerates high temperatures, but grows poorly in low-temperature environments. In winter, it is best to keep the temperature above 10 degrees. If it stays below 5 degrees for a long time, cold damage will occur, causing leaves to turn yellow and drop. In winter, it should be placed in a sunny spot or grown in a greenhouse to prevent low-temperature cold damage from affecting the plant's normal growth.
3. Insufficient light
Radermachera sinica is mostly cultivated as an indoor foliage plant, but it likes light. If it is kept for a long time in a place with insufficient indoor light, the leaves' photosynthesis will be affected, reducing the nutrients synthesized, and the leaves will easily turn yellow and drop. Therefore, in this case, promptly place Radermachera sinica in a spot with plenty of scattered light for care. In winter, it can receive full light. If the indoor area is rather shady, it can be taken outdoors regularly for care to restore its vigor.
4. Poor ventilation
When Radermachera sinica is kept for a long time in a poorly ventilated place, if the branches and leaves are too dense, leaf yellowing and dropping are also very likely to occur. This can be addressed by regular pruning, thinning out overly dense branches, and maintaining good ventilation.
The above is an introduction to the reasons for yellowing and dropping leaves on Radermachera sinica. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.