Acanthocalycium leucanthum

A solitary or clustering grey-green barrel cactus from the dry Monte region of western and northwestern Argentina, with a long thick central spine and large white night-opening flowers. It wants full sun, hot summers and a cool, dry winter.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Widespread in arid Monte scrub and foothills from Salta south to Mendoza and Neuquén, growing on open stony or sandy ground among low shrubs.

Literature gives sea level to about 1,000 m; the measured sites sit at about 620–1,650 m, so it grows somewhat higher than the literature suggests.

Argentina NorthwestArgentina NortheastArgentina South

🔒 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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More Acanthocalycium

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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.