Gymnocalycium stenopleurum

A flattened grey-green chin cactus from the hot Chaco of Paraguay (Cerro León, Boquerón) and adjacent Bolivia, growing at low elevation. It handles serious heat in summer but wants some shade, and a warm, dry winter rest.

At home, aim for

Day Warm-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

Dry Chaco thorn forest and scrub at 10–500 m, typically in partial shade of shrubs and grasses on stony or sandy ground.

Literature gives 10–500 m; climate sites sit at 240–290 m.

Boquerón (Paraguay)Bolivia

🔒 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.