Sedum smallii

A tiny red winter annual (formerly Diamorpha smallii) that lives only in shallow soil on granite and sandstone outcrops of the southeastern US Piedmont. It germinates in autumn, grows through the cool wet months, flowers in spring and dies by early summer, surviving the heat as seed.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

It grows in very thin soil and moss in shallow depressions and solution pits on exposed flat rock outcrops, especially granite. These pockets are waterlogged in winter and bake dry in summer.

Recorded on Piedmont outcrops at roughly 100-360 m. Few records give an elevation.

AlabamaGeorgiaNorth CarolinaSouth CarolinaTennesseeVirginia

🔒 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.