Echinocereus relictus

A clustering hedgehog cactus from the north-eastern Mojave Desert around St. George, Utah, and adjacent Mohave County, Arizona. It was separated from E. engelmannii in 2016 on cytology and its thinner, shorter-spined stems. It needs full sun, hot dry summers and a cold, dry winter rest to produce its rose-magenta flowers.

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 on rock (lithophyte)

Where it grows wild

Rock outcrops and crevices in open hills and valleys, in desert shrub and pinyon–juniper woodland.

700–1,600 m. The records sit at 884–1,494 m, median 1,115 m.

UtahArizona

🔒 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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More Echinocereus

Echinocereus reichenbachii Echinocereus triglochidiatus Echinocereus engelmannii Echinocereus chisoensis Echinocereus dasyacanthus Echinocereus fendleri Echinocereus arizonicus Echinocereus coccineus Echinocereus enneacanthus Echinocereus pectinatus Echinocereus pentalophus Echinocereus rigidissimus All 87 →

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.