Opuntia alta

A tall, upright prickly pear from the coastal plain of south Texas and Louisiana, most often recorded in the lower Rio Grande Valley. It is an easy, sun-loving cactus that takes humid heat and short light frosts, and does best with a cooler, drier 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 thornscrub, brushland and coastal plain grassland on sandy and loamy soils near the Gulf coast, often in full sun.

Lowland plant, recorded from sea level to roughly 100 m.

TexasLouisiana

🔒 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 4.0 licence, unmodified.