Mammillaria parkinsonii

A dichotomously branching, white-spined owl-eye pincushion from the limestone hills of central-eastern Mexico (Querétaro and Hidalgo), at about 1000–1850 m. It wants strong sun, a mineral mix, summer water and a cool, dry winter.

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

Grows on rocky limestone slopes in semi-arid xerophytic scrub, often partly sheltered by shrubs or rocks. It is listed as Endangered, threatened by fragmentation and illegal collection.

984–1849 m, median 1418 m.

QuerétaroHidalgoMexico

🔒 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.