Melocactus trachycephalus

A Turk's cap cactus known only from Aruba, where it grows in hot, dry coastal scrub on rocky ground in full sun. It needs year-round warmth, strong light and a very fast-draining mineral mix, and dislikes cold more than most cacti.

At home, aim for

Day Warm-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

Rocky arid scrub and open ground close to the coast, among low shrubs and other cacti, following what is known for island Melocactus.

Lowland; Aruba rises only to about 190 m and most records lack an elevation.

Aruba

🔒 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.