Armatocereus matucanensis

A tree-like columnar cactus up to about 6 m tall, with segmented, blue-grey stems. It grows on dry western Andean slopes of central Peru, such as around Matucana in Lima, and in southern Ecuador's Loja province. It suits a bright, frost-free greenhouse with mild temperatures, a long dry season and good drainage.

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 on arid to semi-arid rocky slopes of inter-Andean and Pacific-facing valleys, among dry scrub and other columnar cacti.

Recorded at 700–2,900 m, with a median of 1,200 m. Peruvian sites are mostly at 2,000–2,600 m.

PeruEcuador

🔒 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 CC0 licence, unmodified.