Asplenium csikii

Asplenium csikii is the name Kew accepts for the lobed maidenhair spleenwort, widely known as Asplenium trichomanes subsp. pachyrachis. It grows flat against limestone, in crevices and under overhangs of cliffs and old mortared walls, across western and southern Europe to Morocco. It is fully hardy and best grown outdoors or in an alpine house.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

A calcicole of shaded limestone cliffs, crevices, overhangs and old walls, with fronds pressed against the rock.

Recorded from near sea level to 1790 m, median about 890 m.

FranceSpainLuxembourgGermanyEnglandItalySloveniaCroatiaMontenegroSerbiaAlbaniaCreteMorocco

🔒 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.