Gymnocalycium oenanthemum

Gymnocalycium oenanthemum is a small, flattened globular cactus from Catamarca and La Rioja in northwestern Argentina, at 800–1300 m, with wine-red to pink flowers. It is listed as Endangered and wants bright light, warm summer rain and a dry, cool 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

Solitary flattened globes in dry hill scrub and grassland, often in the partial shade of shrubs or rocks, as is usual in the genus.

Wikipedia gives 800–1300 m; the single climate point sits at only 293 m.

CatamarcaLa Rioja

🔒 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 4.0 licence, unmodified.