Aloe castilloniae

A small, sprawling aloe endemic to southern Madagascar, where it grows on limestone cliffs and rocky ridges of the Mahafaly plateau. Its stems lengthen and hang down cliff faces, with small, strongly recurved leaves in five neat rows, and it bears very short spikes of flowers that are swollen at the base. Grow it hot, bright and fast-draining, ideally in a hanging pot or rock crevice, with a drier winter.

At home, aim for

Day IntermediateTargets 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 on rock (lithophyte)

Where it grows wild

It grows on calcareous cliffs and rocky ridges on the Mahafaly plateau, with its stems hanging from crevices in the limestone.

The Mahafaly limestone plateau is low, roughly 100–400 m, in a hot, semi-arid climate.

Southern Madagascar (Mahafaly plateau)

🔒 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.