Oscularia thermarum

A small shrubby Oscularia with toothed, grey, waxy leaves, known only from a small area around Citrusdal in the Olifants River valley of the Western Cape. Like the other species in its genus, it grows among sandstone rocks in full sun and is a winter grower that likes a dry summer.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Oscularia species typically grow in crevices and on ledges of sandstone outcrops in fynbos. The epithet refers to the hot-springs area where it was described. Microhabitat details for this species are generalised from the genus.

No elevations recorded; the single climate site sits at about 280 m on the Olifants River valley floor, and the outcrops nearby are likely somewhat higher.

Cape Provinces

🔒 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 Oscularia

Oscularia deltoides Oscularia cedarbergensis Oscularia comptonii Oscularia piquetbergensis Oscularia vernicolor Oscularia vredenburgensis Oscularia alba Oscularia caulescens Oscularia compressa Oscularia copiosa Oscularia cremnophila Oscularia excedens All 22 →

Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.