Pelecyphora macromeris

A low, clustering Chihuahuan Desert cactus (long known as Coryphantha macromeris) with long, soft tubercles, twisting spines and large magenta flowers in late summer. It wants full sun, heat and summer water, then a cold, completely 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 in the ground

Where it grows wild

Grows on open desert flats and gentle slopes in silty, gravelly or gypsum-influenced soils among sparse shrubs, fully exposed to the sun.

Measured records lie at about 1,090–1,470 m, median 1,350 m, typical of the northern Chihuahuan Desert basins.

New MexicoTexasMexico 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.