Desert Rose
Adenium obesum
Through the year 🗓️
☀️ Summer now
Full sun, real heat, and generous soak-and-dry watering drive both trunk growth and flushes of bloom.
🍂 Fall
Cut water and food back hard as leaves yellow and drop. It's heading into dormancy, not dying.
❄️ Winter
Keep the bare plant warm-ish (above 50 °F) and almost completely dry, with a sip every 4–6 weeks only if the caudex wrinkles.
🌱 Spring
When new leaves break, resume watering and feeding gradually and repot if the caudex has outgrown the pot.
The details
Light & placement
- Light
- Full sun: 6+ hrs of direct light for the fat trunk and the famous flowers
- Ideal PPFD
- 400–800 µmol·m⁻²·s⁻¹
- Grow-light distance
- 6–12 in below LED
Water & feed
- Watering method
- Soak-and-dry, tuned to temperature: water generously in hot bright weather, then let it dry fully; in its cool leafless winter rest, water almost never.
- Fertilizer
- Low-nitrogen or bloom-booster feed at ½ strength, monthly in spring–summer; none once leaves drop.
Home & habit
- Soil
- Very gritty, fast-draining mix (cactus mix + extra pumice); pH 6.0–7.0
- Humidity
- Low (30–40%)
- Temperature
- 65–90 °F; keep above 50 °F
- Mature size
- 2–4 ft indoors with a swollen bottle-trunk
- Repotting
- Every 2–3 yrs in spring; raise the caudex slightly each time for the classic look
- Propagation
- Seed (grows the best fat caudex) or stem cuttings; wear gloves, as the sap is toxic.
When something looks wrong
- Overwatering signs
- A soft, squishy caudex, yellowing leaves, black stem rot
- Underwatering signs
- A wrinkled, deflated caudex and early leaf drop (in season)
- Common pests
- Spider mites, mealybugs, aphids on new growth
Common problems 🩺
The usual suspects when Desert Rose looks unhappy. Most houseplant trouble is watering or light, not disease — see all plant problems if you are not sure which plant is the culprit.
Soft, squishy caudex
Likely cause
Overwatering. The fat trunk is a water store and rots from the inside.
What to do
Very gritty mix, water only when bone-dry, and nearly stop entirely in winter.
Dropping all its leaves in winter
Likely cause
Normal dormancy for an adenium.
What to do
Cut water right back and keep it warm. Leaves return in spring.
No flowers
Likely cause
Not enough direct sun, or too much nitrogen feed.
What to do
Give it 6+ hours of direct light and a bloom-focused, lower-nitrogen feed.
More like this 🌿
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