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Species library › Selaginella › Selaginella douglasii
Terrarium Well documented

Selaginella douglasii

Douglas' spikemoss

Douglas' spikemoss is a mat-forming Selaginella of the Pacific Northwest interior, found from the Columbia River Gorge east into Idaho. It grows on mossy rock outcrops, ledges and thin soil. The climate there has wet, cool winters and hot, dry summers, during which the plant tolerates drying out. It is a temperate spikemoss, not a tropical terrarium plant.

Selaginella douglasii
Photo: Alorin, CC0, via Wikimedia Commons
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

Rocky slopes, basalt outcrops, cliff ledges and mossy banks, often in open woodland or grassland edges. The regional climate implies partly sunny, seasonally dry sites.

Recorded from near sea level in the Columbia Gorge up to about 2,440 m, median 526 m (74 records).

IdahoOregonWashington

🔒 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 CC0 licence, unmodified.