Gymnocalycium monvillei
A large, heavily spined, solitary Gymnocalycium (to about 20 cm across) with big white to pinkish flowers, from the granite sierras of Córdoba and San Luis in Argentina. It wants full sun, summer rain, and a cold, dry winter.
Where it grows wild
Rocky grassland and outcrops in the Sierras de Córdoba and San Luis, growing among stones and grasses that give slight shade at the base.
Reported from 500–2700 m; the measured sites are at 1080–1600 m.
🔒 Growing it like that
The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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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 CC0 licence, unmodified.