Lewisia cotyledon

Lewisia cotyledon is an evergreen rosette succulent from rocky mountain slopes of the Klamath and Siskiyou ranges in southern Oregon and northern California. It sees wet, snowy winters and a hot, almost rainless summer, and in the wild it wedges into rock crevices where water cannot sit in the crown. It is a cold-hardy alpine-garden plant, not an indoor succulent, and its crown must stay dry.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Rock crevices, cliff faces and rocky subalpine slopes, often on steep or north-facing ground where roots run deep into cracks and the crown sheds water.

Recorded from about 60 to 3,100 m, median about 1,600 m; most sites are mid-to-high mountain slopes.

United States (California)United States (Oregon)

🔒 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.