Described by Dinter & A.Berger in 1914, this succulent-stemmed Moringaceae tree is endemic to the arid country of northwestern Namibia and southwestern Angola. Known in English as the "Ghost tree" or "Phantom tree" and in Afrikaans as Sprokiesboom ("fairy-tale tree"), it grows a chalky white, bottle-shaped trunk and reaches around 7 m, occasionally close to 10 m. On a limestone plain in western Etosha National Park stands the Sprokieswoud — the Phantom Forest — a 2 km × 2 km grove made up almost exclusively of this single species, the largest concentration in the world and an icon of the Namibian dry country. The epithet ovalifolia refers to its oval leaflets.
Native climate
Rain concentrates in the warm season, with a dry season of roughly 7 months. Overall a mild climate.
A broad-scale picture of the native range. Real growing spots — rock crevices, fog belts — can be milder.
Sources: climate & elevation WorldClim 2.1 (1970–2000) · occurrences GBIF · native range POWO · current weather Open-Meteo
Care
Light & Placement
In habitat the tree stands on limestone plains and stony slopes under unrelenting Namibian sun and dry wind, so give it as much direct light as possible. Through active growth, full sun outdoors on a well-ventilated bench keeps the trunk chalk-white and tight, with no etiolation. Through Japan's midsummer, light shading at 20–30% combined with raised airflow protects against scorch and humidity stall. After leaves drop, bring it indoors to a bright window kept above 8°C and bone-dry. Avoid setting the pot directly on the ground.
Watering
In active growth, wait until the topsoil is fully dry, then water thoroughly to keep the trunk swelling. Don't leave water in the saucer. Once leaves drop, go fully dry — a single light misting per month is enough.
Substrate
Drainage first, inorganic-led. Akadama : Kanuma : pumice = 3:3:4. A deep pot with generous drainage holes protects the swollen trunk from rot.
Fertilizer & Supplements
A monthly diluted liquid feed in the growing season, or a pinch of slow-release at repotting. Overfeeding elongates branches and softens the bottle silhouette.
Temperature & Overwintering
Optimal 22–35°C, 8°C minimum. Habitat winters are cold-dry; bone-dry plants tolerate brief cold but damp soil under 10°C is fatal. Overwinter on a bright window, fully dry.
Starting from Seed
Where to source seeds
Pre-sowing treatment
Soak seeds for about half a day (overnight) in a mix of a registered seed-treatment fungicide (Benlate or Daconil) and a plant tonic (Menedael; outside Japan, SUPERthrive or a chelated iron / seaweed extract works similarly), each diluted per label. Floaters tend to germinate poorly.
Substrate
A fine-grained, near-sterile seedling mix: fine Akadama, fine Kanuma, vermiculite in 1:1:1 parts. Sterilize with boiling water or a microwave pass for safety.
Sowing method
Seeds are large (around 2 cm including the wing) — press gently into the surface and cover with about 5 mm of mix. Space at least 2 cm apart, not crowded.
Light & temperature
Bright shade, steady at 25–30°C. Expect germination in 7–21 days. Germination depends strongly on seed freshness, but fresh seed tends to come up well.
Watering
Bottom-water with the level 1–2 cm up the pot. For the first 2–3 weeks don't let things dry out, then drop the level gradually as germination evens out.
Fertilizer
No feeding right after germination. Once true leaves emerge, give heavily diluted liquid fertilizer once or twice a month. Growth is brisk, so don't push the dose.
From Germination to Repotting
Germination through true leaves
Continue bottom watering, avoid strong light.
Weaning off bottom watering
Step down gradually over 1–2 months.
First repotting
In year one or two, once root-bound.
Common Pitfalls
Mold & damping-off
- Cause: excess moisture, contamination, poor air flow
- Prevention: sterilize substrate, refresh bottom-water frequently
Etiolation
- Cause: insufficient light
- Prevention: bring LEDs closer right after germination, or move to bright shade outdoors
Seeds fail to germinate
- Cause: stale seed, insufficient warmth
- Prevention: fresh seed and 25–30°C on a heat mat
Notes
Damp soil plus winter cold is the killer combination.
