Desert Rose / Sabi Star
Adenium obesum
description
Desert Rose is a sculptural succulent with a swollen trunk and showy trumpet flowers.
benefits
- Flowering
- Suitable for containers
warnings
- Toxic to cats
- Toxic to dogs
How to care for Desert Rose
sunlight
In the open, sunny drylands of Africa and Arabia, Desert Rose grows with little shade. Give it the brightest spot you have to keep its swollen trunk compact and encourage flowers.
Full sun
A south or west-facing window is ideal. Aim for at least 6 hours of direct sun most days. It can live in bright light with less sun, but may grow lanky and flower less.
Turn the pot every week or two for even growth. If natural sun is limited, use a strong grow light for about 12-14 hours daily.
watering
Water deeply, then let the potting mix dry out completely before watering again. Desert Rose stores water in its swollen trunk, so soggy roots are far riskier than a short dry spell.
Spring and summer growth
In warm, bright conditions, water about every 7-14 days. Soak the mix until water drains out, then wait until it is dry throughout the root ball and the pot feels noticeably light.
Cool or low-light months
Water roughly every 3-5 weeks while growth slows. If it drops leaves and rests in cool conditions, give only enough to prevent the trunk from becoming very wrinkled.
humidity
Relative humidity
Desert Rose comes from seasonally dry tropical regions, so average indoor air suits it well. It is comfortable around 30-50% humidity and usually tolerates roughly 20-60% when it has bright light and good airflow.
Very dry, heated air can contribute to crisp leaf edges, shriveling new growth, or buds dropping, especially while the plant is actively growing. Check the soil too, since underwatering causes similar symptoms.
- Move it away from hot radiators or forced-air vents.
- If needed, use a room humidifier nearby, while keeping air moving around the plant.
- Do not place the pot on a water-filled pebble tray or leave water in its saucer.
temperature
Preferred temperature
Winter minimum
Desert Rose comes from hot, dry regions, so it thrives in steady warmth and handles summer heat well with good light and airflow. Bring it indoors before cool nights arrive, and keep it warmer than 10°C (50°F), especially if the soil is damp.
nutrition
March - August
Feed every 2-4 weeks while your Desert Rose is actively making new leaves or buds. Use a balanced liquid fertilizer for flowering plants at about half strength. Stop feeding when growth slows in autumn and winter, especially if it drops leaves.
Phosphorus
Phosphorus supports root growth and flowering. A regular flowering-plant fertilizer provides enough without needing extra bloom boosters.
Potassium
Potassium helps support sturdy growth and flower production. It is useful during the warm, bright growing season when the plant is actively growing.
soil
Gritty, fast-draining soil
Desert Rose stores water in its swollen trunk, so its roots need plenty of air and should never sit in soggy compost. Use a cactus mix loosened with perlite, pumice, or coarse sand for a light, mineral-rich blend.
pH 6,0 - 7,0
This is slightly acidic to neutral, a range that suits most cactus and succulent mixes. Choose a fresh, free-draining mix rather than trying to adjust pH unless your water or soil is unusually alkaline.