How to Grow Adenium
Adenium obesum
A striking succulent shrub with a swollen caudex and showy pink-red flowers resembling frangipani. Native to arid regions of Africa and Arabia. Thrives in full sun with very well-draining soil and minimal water. Zones 10-12 outdoors.
Yearly Lifecycle
Care Essentials
Feed every 2-3 weeks with a high-phosphorus fertiliser during the growing season to promote flowering. Stop feeding entirely during winter dormancy.
Watch For
- Root rot from overwatering (most common killer)
- Mealybugs and aphids on new growth
- Oleander caterpillar
Track your Adenium care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun, 6+ hours daily
Place in the sunniest spot available. Outdoors in summer is ideal; indoors, a south-facing windowsill is the minimum. Insufficient light leads to weak, leggy growth and poor flowering.
💧 Watering
Water sparingly; let soil dry completely between waterings
Water thoroughly then allow the compost to dry out completely before watering again. In summer this may be every 7-14 days depending on temperature. In winter dormancy (Oct-Feb), stop watering entirely.
🌱 Fertilizing
High-phosphorus feed every 2-3 weeks during the growing season
Apply a liquid fertiliser high in phosphorus (e.g. a cactus or tomato feed) every 2-3 weeks from spring through to late summer to encourage prolific flowering. Stop feeding completely once dormancy begins in autumn.
✂️ Pruning
Prune lightly after flowering to shape and encourage branching
Remove spent flower heads and any dead or crossing branches after the main flowering flush. Light pruning encourages a more branched caudex and additional flower bud sites. Avoid heavy pruning in autumn or winter.
🌿 Temperature
Minimum 10°C; frost-free year-round
Adenium is a tropical succulent and cannot tolerate frost. Keep above 10°C at all times. During winter dormancy, 10-15°C is ideal. In summer it thrives in heat above 25°C. In temperate climates it must be brought indoors before the first frost.
Growing Tips
Never overwater
The swollen caudex stores water reserves — overwatering is the number one killer. Always let the soil dry out completely between waterings, and never let the pot sit in standing water.
Full sun is essential
Adenium needs at least 6 hours of direct sun daily. A south-facing windowsill is the minimum indoors; move it outside in summer for best flowering.
Induce dormancy in winter
Stop watering entirely from October to February and keep the plant at 10-15°C. This cold, dry rest triggers the spectacular spring flower flush.
Use gritty cactus compost
Standard potting mix retains far too much moisture. Use 50% coarse grit or perlite mixed with 50% compost to ensure fast drainage and prevent root rot.
Pests & Diseases
Pest Mealybugs
Pest Aphids
Pest Oleander Caterpillar
Disease Root Rot
Symptoms: Yellowing leaves that drop; soft, mushy caudex at the base; foul smell from the soil; plant collapses despite appearing watered.
Treatment: Unpot immediately. Cut away all blackened, mushy roots with sterile scissors. Dust cuts with powdered sulphur or cinnamon. Allow to dry in open air for 2-3 days before repotting into fresh dry gritty compost. Withhold water for at least 2 weeks.
Disease Stem Rot
Symptoms: Dark, water-soaked lesions on stems or branches, often starting at the soil line; affected tissue turns soft and collapses; may spread upward rapidly.
Treatment: Cut back to firm healthy tissue using sterile, sharp tools. Treat the cut surface with fungicide paste or powdered sulphur. Improve air circulation and reduce watering frequency to prevent recurrence.
Log Adenium in your garden — track growth, care, and harvests year after year
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