Sedum japonicum

A mat-forming stonecrop with small fleshy leaves and starry yellow flowers in late spring. It grows wild on rocks, walls and seaside cliffs in Japan, Korea, eastern China and Taiwan. It is hardy and easy, and likes sun, a humid summer and sharp drainage.

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

Grows on rocks, cliffs, stone walls and thin soil, from coastal rocks to mountain outcrops, usually in sun or light shade. It often forms dense low mats in crevices.

Mostly near sea level (median about 25 m), but recorded up to about 3,000 m in mountain areas.

China SoutheastJapanKoreaNansei-shotoTaiwan

🔒 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.