Gymnocalycium pflanzii

One of the largest Gymnocalycium, a broad flat-globular cactus of the Gran Chaco and dry inter-Andean valleys of Bolivia, Paraguay and north-west Argentina. It grows half-shaded under thorn scrub, so it wants bright but not scorching light, summer water and a dry winter.

At home, aim for

Day IntermediateTargets 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

Large solitary cactus of dry Chaco woodland and thorn scrub, often in the shade of shrubs on sandy or stony soils.

Records from 200 to about 1850 m, most in Bolivian foothill valleys near 1000–1700 m.

BoliviaParaguayNorthwest 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. Photo from Wikimedia Commons, used under its CC BY 3.0 licence, unmodified.