What causes the leaves of the Radermachera sinica to turn yellow and fall off
Radermachera sinica is a large foliage potted plant, generally grown indoors, but mostly in home and office environments, it can absorb harmful substances in the air and has a radiation-protection effect. However, during care, the leaves often turn yellow and fall off, and in severe cases this can lead to death, greatly reducing its ornamental value. So what causes this? Let's find out together.
1. Excess water
Radermachera sinica likes moisture and dislikes waterlogged soil. In hot seasons, evaporation is high and the demand for water is greater. If the soil is too heavy or the drainage holes are blocked, and it stays wet for a long time after watering, the roots will suffocate due to insufficient oxygen supply, causing the roots' absorption capacity to weaken. When nutrient and oxygen supply is insufficient, the leaves turn yellow. Therefore, in hot seasons, pay attention to watering, keep the soil moist, and when the soil is heavy, replace the soil and repot in time. Avoid long-term water accumulation, loosen the soil in good time, and maintain good permeability.
2. Temperature too low
The suitable growing 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 the leaves to turn yellow and fall off. In winter, it should be placed in a sunny spot or grown in a greenhouse, so that low-temperature cold damage does not affect 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 an indoor place with insufficient light, the leaves' photosynthesis will be affected, reducing the nutrients synthesized, and the leaves will easily turn yellow and fall off. So in this case, promptly place the Radermachera sinica in a place with plenty of scattered light for care. In winter, it can receive full light. If the indoor spot 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, and if the branches and leaves are too dense, yellowing and falling leaves also occur very easily. This can be addressed by regular pruning, thinning out overly dense branches, and maintaining good ventilation.
The above is an introduction to the reasons why Radermachera sinica leaves turn yellow and fall off. We hope it helps. To learn more related knowledge, please stay tuned to us.