Crassula humbertii

One of the few Crassula species native to Madagascar, known from scattered collections in the south and a single northern site. Little is published on its ecology, so these conditions are built from the measured climate at its recorded sites and from how Malagasy rock-outcrop succulents are grown.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Specific habitat notes were not found. The recorded sites span dry southern lowlands and mid-elevation central-southern uplands, which suggests rocky ground or thin soil in open vegetation, like other Malagasy succulents.

GBIF records run from 76 to 1308 m, with a median of 1308 m across the 8 records that give an elevation.

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 4.0 licence, unmodified.