Gymnocalycium gibbosum

The southernmost Gymnocalycium, a dark green globular to short-columnar cactus of the Patagonian steppe and the hills of southern Buenos Aires province. It is among the most cold-hardy cacti in the genus and wants full sun, a dry cold winter and a very mineral mix.

At home, aim for

Day Cool-growingTargets in Plantistry

Night A clear drop at nightTargets 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 open, shrubby steppe on sandy, stony or gravelly ground and rocky outcrops, often partly sheltered by low bushes.

Records are mostly below about 300 m in Patagonia; the few labelled elevations are 700–1,210 m.

Argentina

🔒 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.