Crassula rattrayi

A small rosette-forming Crassula from the Eastern Cape Karoo, where there is summer rain and a cold, dry winter with frost. It grows actively in the warm months and needs a dry, cool rest in winter. Give it bright light with some shelter from the hottest sun.

At home, aim for

Day Cool-growingTargets in Plantistry

Night A clear drop at nightTargets 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

Probably shallow soil pockets and crevices on rocky outcrops in Karoo scrub, often in the partial shelter of rocks. This is inferred from the genus and the measured sites, not from a species account.

The main climate sites lie at about 1280 to 1650 m on the Great Karoo escarpment.

Eastern Cape

🔒 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.