Adiantum tracyi

Tracy's maidenhair is a rare Californian fern, generally treated as the hybrid between the California maidenhair (A. jordanii) and the western five-finger maidenhair (A. aleuticum). It grows on moist, shaded banks in coastal-range ravines, so it needs cool, damp shade and a mild Mediterranean rhythm.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light ShadeDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Specimens are from shaded, moist banks in gorges and ravines above streams, for example near Garberville and along the Sacramento River. Collectors repeatedly note it as rare.

Wild specimens are from low elevations, roughly 100–400 m.

CaliforniaWashington

🔒 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.