Pachypodium rutenbergianum

Pachypodium rutenbergianum is a tree-sized pachycaul from the dry deciduous forests and rocky outcrops of western and northern Madagascar, reaching 3–8 m with a swollen trunk, short spines and white flowers. In cultivation it wants heat, strong sun and a dry, leafless rest in the cooler months.

At home, aim for

Day Warm-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Grows in seasonally dry deciduous forest and bush on rocky ground in the lowlands of western and northern Madagascar, emerging above the low canopy into full sun.

Recorded from 10 to 850 m, mostly near 100 m; a lowland species.

Madagascar

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates

✓ Humidity band, and how to hold it

✓ Light as DLI and PPFD for a grow light

✓ Wet and dry seasons, and whether to rest it

✓ Substrate and airflow

✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.