Asplenium demerkense

An Ethiopian highland spleenwort of the Simien, Bale and Choke mountains, recorded at about 3,000–4,000 m. Labels place it on rocky outcrops in open Helichrysum heath, in moist precipices and on stream banks. It needs cool days, cold nights and bright light, which makes it a challenging alpine-house fern.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Collections come from a rocky outcrop in open Helichrysum heath on the Sanetti Plateau, a moist precipice in the Simien Mountains, and stream banks. It is a rock and bank fern of the afroalpine and ericaceous belts.

Recorded elevations are 3,050–4,000 m, with a median of 3,500 m.

Ethiopia

🔒 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.