Gymnocalycium marekiorum

A small, flattened globular cactus from the Chiquitano region of eastern Bolivia, related to G. chiquitanum. It grows in a hot lowland climate with a wet summer and a dry winter, so it wants warmth, bright but not scorching light, and a dry, cooler rest.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Grows on rocky outcrops and in thin soil among grasses and shrubs in the dry Chiquitano forest and savanna of Santa Cruz department; information is limited and largely inferred from the records and related Chiquitano Gymnocalycium.

The climate sites lie at about 290 to 310 m; the outcrops of the region reach several hundred metres higher.

Bolivia (Santa Cruz)

🔒 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 3.0 licence, unmodified.