Echinocereus rigidissimus

The rainbow hedgehog cactus, a columnar Echinocereus banded in pink, red and white comb-like spines, from rocky slopes of south-eastern Arizona, south-western New Mexico and northern Mexico. It needs full sun, a gritty mix, a summer monsoon pattern and a cold, dry winter to flower.

At home, aim for

Day IntermediateTargets 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, often south-facing slopes in desert grassland and oak woodland edges, tolerating small grass fires but not hot ones.

About 1,200 to 2,000 m; records here run 1,173 to 2,286 m, median 1,524 m.

ArizonaNew MexicoSonoraChihuahua

🔒 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.