Gymnocalycium mostii

A solitary, flattened globular cactus from the grassy slopes of the Sierras de Córdoba in Argentina. It grows up to about 13 cm across and has large pink to white flowers. It wants a warm, wet, bright summer and a cold, dry winter rest, which is what makes it flower.

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

Grows in highland grassland and among rocks in the Córdoba sierras, often partly sheltered by grass tufts and shrubs rather than fully exposed.

The literature gives 500–1500 m; the recorded elevations are 500–968 m (median 592 m).

ArgentinaCórdoba

🔒 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.