Coryphantha ramillosa

A small, solitary Chihuahuan Desert cactus with dark central spines and large pink flowers, found on limestone in the Big Bend region of Texas and adjacent Coahuila. It wants full sun, very sharp drainage, summer water and a cold, dry winter.

At home, aim for

Day IntermediateTargets 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 in the ground

Where it grows wild

Dry, rocky limestone hills and ledges in sparse desert scrub, often in remote, hard-to-reach terrain.

Recorded at 212–2605 m, median about 1100 m.

TexasCoahuilaChihuahuaMexico 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 4.0 licence, unmodified.