Oreocereus leucotrichus

A clumping, white-haired columnar cactus of the high Andean deserts of southern Peru and northern Chile, mostly recorded around 3,000–3,700 m. It wants intense sun, a big day-night swing, cold dry winters and very sharp drainage; warm, dim, humid winters are what kill it in cultivation.

At home, aim for

Day Cool-growingTargets in Plantistry

Night A clear drop at nightTargets 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 rocky slopes and scrub of the puna and prepuna, where the sun is extreme, rain falls in a short summer burst and nights are near freezing for half the year.

Literature gives about 2,000–3,500 m; the measured records have a median of 3,409 m and sites up to about 4,100 m.

PeruChile NorthBolivia

🔒 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 3.0 licence, unmodified.