What causes yellowing leaves on a desert rose
The desert rose (Adenium obesum) is a succulent plant in the dogbane family (Apocynaceae). Previously, Qinnong Web introduced the cultivation methods for the desert rose to everyone. Today, Qinnong Web will introduce a problem encountered when growing desert roses, namely what to do when the leaves of a desert rose turn yellow during cultivation. Qinnong Web has listed five causes that can lead to yellowing leaves on desert roses, and provides corresponding solutions. Let us take a closer look below.
1. Harsh environment
The desert rose originates from near deserts. Although it does not grow directly in deserts, it does share some characteristics of desert plants, such as being able to survive in arid environments and not tolerating humid environments. Therefore, if the environment where the desert rose is grown does not allow air circulation, has weak light, and is further affected by watering or rain, it will cause the leaves of the desert rose to turn yellow. In severe cases, it can also cause the entire desert rose plant to rot and die.
Solution:
The most important thing is still to become familiar with the growth characteristics of the desert rose, and to give it the best possible growing conditions during cultivation. For details, please refer to our Qinnong Web article on the cultivation methods for the desert rose. If yellow leaves appear, reasonable care should be carried out according to the condition to prevent it from worsening.
2. Overwatering
Overwatering is also an important cause of yellowing leaves. The desert rose does not tolerate humidity, so the amount of water given must not be too much; otherwise, it will cause water to accumulate at the roots, leading to root rot, which in turn makes the leaves turn yellow and fall off, or even wither.
Solution:
Cut away the rotted roots and pay attention to reasonable watering of the desert rose. Do not water too much; water sparingly. The desert rose is drought-tolerant, so it does not need too much water.
3. Temperature too low
In winter, the climate is cold and the temperature is relatively low. At this time, the desert rose enters a dormant period, and it may dry out and drop leaves in order to reduce its own water evaporation and protect itself. At this time, fertilizing must not be excessive or too concentrated; otherwise, it will cause the leaves to turn yellow or even die.
Solution:
Winter care requires ensuring a certain temperature. If necessary, it can be moved indoors or placed in a greenhouse for cultivation. If greenhouse conditions are not available, you can cover it with a plastic film to create a simple greenhouse effect.
4. Poor ventilation
The desert rose likes warmth and a well-ventilated growing environment. Poor ventilation will cause the plant's roots to rot and its leaves to turn yellow.
Solution:
If growing it indoors, you can place the potted desert rose in a ventilated spot indoors, such as a balcony or windowsill, or usually put it outdoors more often for ventilation. Do not leave it indoors for long periods.
5. The impact of pests and diseases
Pests and diseases are also an important cause of yellowing leaves on desert roses. The main pest affecting desert roses is scale insects. When the infestation is severe, it can cause the whole plant to drop leaves, stop growing, and eventually die.
Solution:
Scale insects can usually be observed with the naked eye. At this time, you can use a soft brush to gently brush the leaves and sweep the pests away. If the infestation is relatively severe, insecticides must be used to kill them. A 40% omethoate emulsifiable concentrate solution diluted 2000 times can be used for spraying control.
The above is what Qinnong Web has introduced regarding the causes of yellowing leaves on desert roses and the corresponding solutions. In fact, to grow desert roses well, the key is still to pay attention to their growth habits, and to observe more for the appearance of pests and diseases during routine care. In this way, they can be grown very well.