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Species library › Blechnum › Blechnum maximum
Ferns Partly documented

Blechnum maximum

The giant rasp fern, long known as Doodia maxima, a terrestrial fern of moist subtropical forest in south-east Queensland and north-east New South Wales. It wants dappled shade, steady moisture and a mild climate with a cooler, drier winter.

At home, aim for
Day IntermediateTargets 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 in the ground

Where it grows wild

Wild records cluster in the rainforest and wet-forest country of the Scenic Rim, Border Ranges and Sunshine Coast hinterland. Like other rasp ferns it grows on the ground along forest margins, gullies and stream banks; species-specific habitat notes were not checked.

Climate sites run from near sea level to about 460 m; few records carry an elevation.

QueenslandNew South Wales

🔒 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.