Tephrocactus geometricus

Tephrocactus geometricus is a small, slow cactus of rounded, almost spineless grey to purplish segments from the arid lowlands and foothills of Catamarca and La Rioja in northwestern Argentina. It grows in full sun on stony ground with hot summers, cool dry winters and a short summer rainy season. Grow it hard: maximum light, sharp drainage 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 Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Open, stony desert scrub and gravel plains among low shrubs, fully exposed to sun.

Few records carry an elevation; the climate sites span about 600 to 2,000 m, with most weight near 2,000 m in Catamarca, though the species is usually reported from lower valleys.

Argentina Northwest

🔒 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 Tephrocactus

Tephrocactus articulatus Tephrocactus bonnieae Tephrocactus abditus Tephrocactus alexanderi Tephrocactus aoracanthus Tephrocactus aulacothele Tephrocactus fiambalensis Tephrocactus halophilus Tephrocactus molinensis Tephrocactus nigrispinus Tephrocactus recurvatus Tephrocactus verschaffeltii

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.