Oncidium calanthum

A scrambling Andean Oncidium of the heteranthum group (sometimes split as Heteranthocidium), with long branching inflorescences carrying many sterile flowers and a few fertile ones. Records span 450 to 3,100 m in Ecuador and northern Peru, so it is adaptable, but the cool cloud-forest sites suggest intermediate-to-cool culture.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on trees (epiphyte)

Where it grows wild

Epiphyte in montane and cloud forest, with a cluster of records at about 450–600 m in the coastal cordilleras of western Ecuador (garúa forest) and others at 2,800–3,300 m in the Andes. Plants of this group grow on branches and along forest edges in fairly bright light.

Recorded at 450–3,100 m, median 590 m from 6 records; the climate sites run from 590 m to about 3,280 m.

EcuadorPeru

🔒 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.