Gymnocalycium bruchii

A small, freely clustering chin cactus from the hills of Córdoba and San Luis in central Argentina, forming mats of heads under 4 cm tall. It comes from a climate with warm wet summers and cold, almost rainless winters with nights near freezing, and it flowers best after a cool dry rest.

At home, aim for

Day Cool-growingTargets in Plantistry

Night A clear drop at nightTargets 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

Grassy and rocky slopes of the Sierras of Córdoba and San Luis, often nestled among grasses and stones that give some side shade.

Reported from about 500 to 2000 m; the measured sites sit at 1100–1600 m.

Argentina (Córdoba)Argentina (San Luis)

🔒 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.