Desert rose yellow leaves: what to check

Record whether yellowing affects older lower leaves during winter rest, new leaves or the whole plant, and whether leaves are soft, dry or dropping or paired with a soft caudex, wet mix or pests.

Check whether the mix is wet or dry, whether the caudex and roots are firm, how much bright light the plant receives, whether temperatures fell toward rest or chill conditions, and whether fertilizer or mealybug activity changed.

Yellow leaves can follow normal winter rest, overwatering or root damage, an overly dry active-growth plant, low light, excess fertilizer, chill, poor drainage, nutrient shortage and mealybugs.

Compare the season and root zone before acting: respect winter rest, correct saturation or prolonged dryness, provide bright light, protect from chill, and review fertilizer or visible mealybugs only after checking the caudex and drainage.

After the plant returns to suitable light, temperature and water conditions, compare new growth and the caudex with the affected leaves. Continuing yellowing, soft tissue or repeated drop needs another season and root review.

Adenium obesum can shed leaves during a normal rest period, while yellowing outside that cycle can have several cultural causes. The caudex and hybrid or cultivar background make a fixed calendar response unreliable.