Asplenium chathamense

Chatham Island spleenwort

A robust spleenwort endemic to the Chatham Islands, with glossy dark green, two- to three-times-divided fronds up to about 45 cm long. It grows in coastal rock crevices, on cliffs and in coastal scrub and forest, in a cool, windy, oceanic climate. It is easy from spores or divisions, but slow; grow it cool, moist and in semi-shade.

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

No rest periodGrows on rock (lithophyte)

Where it grows wild

Coastal rocks and cliffs, in crevices or on the ground, and in coastal scrub, open coastal forest and along creeks. It is common as a ground and rock fern under forest on some islands, and also grows on exposed headlands, cliff lips and shaded schist outcrops within reach of salt spray.

Mostly near sea level to about 200 m; the Chatham Islands rise only to about 300 m.

Chatham Islands (New Zealand)

🔒 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.