Gymnocalycium spegazzinii

A flat, grey-brown globular cactus from the dry Andean valleys of Salta, Tucumán and Catamarca, valued for its curved spines and white to pink flowers. It has rainy summers, very dry winters with cold nights, and fierce sun.

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

Rocky slopes in arid valleys and pre-puna scrub, in full sun among low shrubs.

Recorded at 1,554–2,650 m, median 2,282 m; the literature gives 1,500–3,000 m.

Argentina (Salta)Argentina (Tucumán)Argentina (Catamarca)Bolivia

🔒 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 CC0 licence, unmodified.