Kroenleinia grusonii

The golden barrel cactus, formerly Echinocactus grusonii, a slow, globular cactus with bright yellow spines. Abundant in cultivation but very rare in the wild in central Mexico, it needs strong sun, a gritty mix and a dry, cool winter rest.

At home, aim for

Day Cool-growingTargets 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 steep rocky slopes and cliffs in semi-arid scrub of canyons in central-eastern Mexico, much of it now lost to a reservoir.

Recorded at 1119–2209 m, median about 1784 m.

Central-eastern Mexico (Querétaro and Hidalgo)

🔒 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-SA 2.5 licence, unmodified.