What causes yellow leaves on potted desert rose?

Desert rose, also called Adenium obesum, is a succulent shrub that can grow up to 4.5m tall, with flowers in red, rose red, pink, white and other colors, and is a common flowering plant in homes. Recently, some flower growers have reported that desert rose leaves turn yellow in spring - what is going on?

Desert rose is drought-tolerant and is suitable for growing in sandy soil rich in calcium, loose and breathable, with good drainage. Desert rose has fleshy roots; watering too much or too often, combined with poor ventilation and insufficient light, can very easily cause the plant's leaves to turn yellow.

At this point, the amount of watering must be strictly controlled. For plants with severe root rot, the rotten roots should be cut off promptly, and then the plant should be repotted for care.

In addition, applying too much or too concentrated fertilizer causes the soil to become compacted, making it hard for the plant to breathe, which leads to root rot and yellowing leaves. Desert rose grows slowly, so applying well-rotted compost is best, as it has good slow-release properties.