Echinocactus horizonthalonius
A small blue-grey barrel cactus with spiralling ribs and magenta flowers, from the limestone hills of the Chihuahuan Desert and nearby Sonoran Desert. It needs full sun, very fast mineral drainage and a dry winter. It is notoriously slow and prone to rot on its own roots.
Where it grows wild
Grows on open, rocky limestone slopes and gravel flats in desert scrub, fully exposed to the sun.
Recorded at 793-2,083 m, median 1,423 m, though only 18 records carry an elevation.
🔒 Growing it like that
The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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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 4.0 licence, unmodified.