Ferocactus diguetii

The giant barrel cactus of the Gulf of California islands and the southern Baja California Sur coast, the largest in the genus (1–2 m, rarely 4 m tall). It needs full sun, heat, and a mostly dry year with late-summer rain, and is slow but easy if kept warm and dry in winter.

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 in the ground

Where it grows wild

Coastal desert scrub on Gulf islands and the nearby peninsula, from mountainsides among large igneous rocks to old shell beaches, with Bursera microphylla and Pachycereus pringlei.

Wikipedia gives about 10–300 m; records run from 6 to 652 m, median 209 m.

Baja California SurGulf of California islands

🔒 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 Ferocactus

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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.