What to Do When Crown of Thorns Leaves Turn Yellow and Drop? Causes and Solutions
Crown of Thorns, also called Euphorbia milii, is a sprawling shrub plant with many branches. Crown of Thorns has high ornamental value and is commonly seen in shopping malls, parks and other places across China. Moreover, its roots, stems and leaves have certain medicinal value, and it is loved by many people. However, when growing Crown of Thorns, the phenomenon of leaves turning yellow and dropping often occurs. So what should be done when Crown of Thorns leaves turn yellow and drop? Let's take a look below!
1. Drainage and Root Pruning
Before dealing with yellowing and dropping leaves on Crown of Thorns, we first need to understand clearly what is causing it. If it is caused by overwatering or being rained on, resulting in water accumulating in the soil, then it will cause root rot in Crown of Thorns, which in turn triggers phenomena such as leaves turning yellow and dropping. So if this is the cause, then promptly take the whole Crown of Thorns plant out, check the roots, and cut away the rotted root parts. Then place it in carbendazim to disinfect, then let it dry before planting it in dry, clean soil. Usually also pay attention to doing drainage work well, focusing on prevention, to avoid water accumulating in the soil.
2. Improve Ventilation
Yellowing and dropping leaves on Crown of Thorns may also be caused by poor air circulation. Because if air circulation is poor, then the indoor oxygen content will decrease and air quality will worsen. This affects the respiration of Crown of Thorns leaves, inhibits leaf growth, and leads to leaves turning yellow and dropping. Therefore we should pay attention to maintaining a growing environment with good ventilation and strengthen ventilation management. If the temperature is too low, then when ventilating, keeping warm should be the prerequisite. It should be done at noon or other times when the temperature is slightly higher, to prevent cold air from blowing in and causing the plant to suffer cold damage.
3. Temperature Control
Temperature is also one of the main causes of yellowing and dropping leaves on Crown of Thorns. Crown of Thorns likes to grow in a warm environment, and its cold resistance is very poor. If the temperature is too low, it will cause cold damage to the plant; in mild cases it will cause leaves to turn yellow and drop, and in severe cases it may cause the plant to die. Therefore we should pay attention to controlling the temperature well, especially in winter, and do a good job of cold protection and warmth preservation. The temperature should not be lower than zero degrees at minimum, but in winter Crown of Thorns will enter a dormant period, and leaf drop during the dormant period is also a normal phenomenon.
4. Light Management
Light is also very important for the growth of Crown of Thorns. Especially for the development of Crown of Thorns leaves, Crown of Thorns is a long-day plant. If there is insufficient light, then it will cause poor growth of Crown of Thorns, affect the photosynthesis of the leaves, and reduce the accumulation of photosynthetic substances, thus causing leaves to turn yellow and drop. Therefore we should pay attention to placing Crown of Thorns in a place with sufficient light for care, but in summer pay attention to appropriate shading to avoid leaves being scorched by overly strong light. In spring and autumn, the plant can be given full sun to ensure normal growth of Crown of Thorns.
The above is a brief introduction to what to do when Crown of Thorns leaves turn yellow and drop. That's all for today's introduction. This article is for reference only, and I hope it can be helpful to everyone!