Cochemiea theresae

A tiny cylindrical cactus with feathery white spines and large purple flowers, known from high grassland in Durango, Mexico, at about 2,100-2,500 m. It needs bright light, cold dry winters and very careful watering; its taproot rots easily, so many growers keep it grafted.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Rocky slopes in high-elevation grassland and open oak-pine scrub, growing among stones and grass tufts that give slight shade at the base.

Recorded at 2,136-2,464 m, median about 2,260 m.

Mexico Northeast (Durango)

🔒 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.