Gymnocalycium hossei

A flattened, grey-green to bluish globular cactus from grassy, rocky slopes in La Rioja and Catamarca, Argentina. It wants hot, bright summers with some rain and a cold, completely dry winter.

At home, aim for

Day Cool-growingTargets 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

Grows on steep grassy and rocky slopes in the arid hills of northwestern Argentina, usually solitary and partly sheltered by grass and shrubs.

Few GBIF records carry an elevation. The literature gives a broad altitude range up to about 1,900 m.

Argentina (La Rioja)Argentina (Catamarca)Argentina (Córdoba)

🔒 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.