Species library › Calathea › Calathea platystachya
Other Partly documented

Calathea platystachya

A giant Calathea from the hot, wet lowlands of southern Pacific Costa Rica. It reaches 2–4 m, with very large green leaves on long petioles and spikes of green bracts covered in white wax around small orange flowers. It needs a big warm greenhouse, constant moisture and humid air rather than a windowsill.

At home, aim for
Day Warm-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Humid airBand in Plantistry
Light ShadeDLI and PPFD in Plantistry
No rest periodGrows in the ground

Where it grows wild

Recorded mainly from the Osa Peninsula and Golfo Dulce lowlands, where it grows as a large terrestrial herb in wet lowland forest. Big Marantaceae like this usually grow in understory gaps, along streams and at forest edges, where more light reaches them than on the deep forest floor.

Recorded at 8–744 m, median 105 m. It is a lowland species.

Costa RicaPeru

🔒 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.