Mammillaria winterae

A large, usually solitary Mammillaria from the Chihuahuan Desert hills of northeastern Mexico, mainly around Monterrey and Saltillo at 800–1,650 m. It wants full sun, hot summers, cold dry winters and a very free-draining mineral mix.

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

Records cluster in the Sierra Madre Oriental foothills of Nuevo León and Coahuila, with outliers in Tamaulipas. Like its relatives it grows on rocky, mostly limestone slopes in desert scrub, in full sun or light shade of shrubs.

Recorded from 796 to 1,633 m, median about 1,400 m.

Nuevo LeónCoahuilaTamaulipas

🔒 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 4.0 licence, unmodified.