Opuntia triacanthos

A small Caribbean prickly pear of exposed coastal limestone and reef sand, from Desecheo Island off Puerto Rico through the Lesser Antilles. It stays low or semi-upright to about 60 cm and wants hot, bright, frost-free conditions all year with a modest dry season.

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

Grows on sandy limestone and old raised reef along exposed coasts, in open scrub with little or no shade and constant sea wind.

Essentially a sea-level plant; the single measured site is at about 5 m.

Puerto Rico (incl. Desecheo)Leeward IslandsWindward 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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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.