Huperzia appressa

Huperzia appressa is a small arctic-alpine fir clubmoss, up to about 10 cm, that grows in tundra, rocky heath and high mountain grassland across the northern hemisphere. It needs cool summers, a long cold winter and acidic, well-aerated soil. It is very difficult to keep long term away from cool, northern conditions.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

It grows on the ground in exposed alpine and arctic heath, among rocks, on scree and in short tundra vegetation, often where snow lies late.

Near sea level in the Arctic, rising to high alpine zones further south, for example about 1,300 m in southern Norway and much higher in the Himalaya and Tibet.

SvalbardShetlandNorwayRussia and SiberiaRussian Far EastCaucasusChinaTibetJapanTaiwanHimalayaMyanmarGreenlandCanadaUSA (Michigan)

🔒 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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More Huperzia

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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 3.0 licence, unmodified.