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Species library › Drynaria › Drynaria roosii
Ferns Well documented

Drynaria roosii

A basket fern of subtropical eastern Asia, used in Chinese medicine as gu sui bu. Brown, papery nest fronds collect leaf litter around its rhizome on rocks and tree trunks; the green fertile fronds die back in the cool, dry winter.

Drynaria roosii
Photo: Dandan0721, CC BY-SA 4.0, via Wikimedia Commons
At home, aim for
Day IntermediateTargets 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 trees (epiphyte)

Where it grows wild

On trees and rocks in subtropical forest and on rocky slopes, with nest fronds trapping humus.

Recorded at 139–1228 m, median 600 m.

ChinaTaiwanHainanRyukyu IslandsVietnamLaosThailand

🔒 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. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.