Adiantum gingkoides

A little-known maidenhair described by Christensen in 1934 from caves in the limestone country of Khammouane (Cammon) province in central Laos. Kew lists it for Laos and Vietnam. It is a karst fern of shaded, moist limestone, best grown warm and humid on a lime-rich, well-drained medium.

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

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

The type labels say it came from a cave in limestone near the village of Tham in Khammouane, at about 150–160 m. It probably grows on shaded rock and soil pockets near cave mouths, where the air stays moist through the dry season. Nothing more specific has been published.

Old herbarium labels give about 150–160 m. The two climate sites used are at 116 m and 451 m.

Laos: Khammouane (central karst)Vietnam (listed by Kew)

🔒 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.