Mammillaria orcuttii

A small Mammillaria of the high plateau of San Luis Potosí in north-eastern Mexico, at about 1,850–2,330 m. It needs strong light, a dry and cold winter rest, and summer water.

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

Little is published on its habitat; it grows in high-altitude scrub and grassland on limestone or other rocky ground, often in the partial shelter of grasses or shrubs.

Recorded at 1,848–2,332 m, median 2,125 m.

MexicoSan Luis Potosí

🔒 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 2.0 licence, unmodified.