Mammillaria glochidiata

A small clustering Mammillaria with hooked central spines, known only from the Barranca de Toliman in Hidalgo, Mexico, and listed as Critically Endangered. It grows on rock in a canyon at around 1,450 m, with warm days, cool dry winters and summer rain, so it wants bright but not scorching light and a dry, cool winter rest.

At home, aim for

Day Cool-growingTargets in Plantistry

Night A clear drop at nightTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Rock faces and rocky slopes in a semi-arid canyon in Hidalgo; cliff-dwelling Mammillaria of this group usually sit in crevices with some shade from the canyon walls for part of the day.

The two records sit at about 1,450 m in the Barranca de Toliman.

Hidalgo (Mexico)

🔒 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.