Euphorbia heptagona

A clustering, spiny, cactus-like Euphorbia from the Karoo and Eastern Cape of South Africa. It wants full sun, very sharp drainage, hot summers and a cool, dry winter.

At home, aim for

Day Cool-growingTargets 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

Grows in dry Karoo scrub on stony slopes and flats in full sun, forming dense clusters of ribbed, spiny stems.

Records centre on the Little Karoo at about 500–800 m.

South AfricaWestern CapeEastern Cape

🔒 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.