Cochemiea guelzowiana

A clustering, softly hairy-spined cactus from northern Mexico with very large magenta flowers and hooked central spines. It grows on rocky outcrops and is notoriously prone to rot, so it needs bright light, a purely mineral mix and careful, sparse watering with a dry winter.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Rocky outcrops in hot desert and on grassy mountain tops, alongside other small cacti and ocotillo.

About 1,300–1,700 m; the three climate sites sit at 1,400–2,300 m.

Mexico Northeast

🔒 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 2.5 licence, unmodified.