Gymnocalycium uruguayense

A low, flattened, clustering chin cactus from the rocky grasslands of Rio Grande do Sul and northern Uruguay, listed as Vulnerable. Its climate is subtropical with hot summers, cool damp winters and rain in every month, so it wants more winter cold and less summer baking than Andean Gymnocalycium.

At home, aim for

Day IntermediateTargets in Plantistry

Night A clear drop at nightTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Grows low among grasses and rocks in the open campos of the Brazil–Uruguay border, where grass tufts give the bodies some side shade. Habitat detail is inferred from the genus and region; species-specific field notes were not found.

Few records carry an elevation; the recorded points lie in low rolling hill country, roughly 100–300 m.

Rio Grande do Sul (Brazil)Uruguay

🔒 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.