A dwarf caudex-forming succulent endemic to the Richtersveld of Northern Cape, South Africa, with one of the narrowest natural ranges in the genus. The specific epithet pygmaea means "dwarf" — and the plant lives up to it, spreading horizontally near ground level rather than climbing. Small blue-green leaves, a low spreading habit, and a rounded caudex give it an unusually bonsai-like character among caudiciforms. Seed circulation is limited and growth is famously slow, so plan on a long horizon — this is a mid-to-advanced species for keepers willing to take their time from seed. Following phylogenetic work by Bruyns & Klak (2008), the currently accepted name in POWO (Kew) is Portulacaria pygmaea, but in horticulture the Ceraria convention persists and is used on this site.
Native climate
Rain concentrates in the warm season, with a dry season of roughly 6 months. Overall mild, with a wide temperature range.
* Accurate distribution data is scarce for this species, so these values are taken from the climate near the approximate center of its native range instead.
Sources: climate & elevation WorldClim 2.1 (1970–2000) · occurrences GBIF · native range POWO · current weather Open-Meteo
Care
Light & Placement
On the stony slopes of the Richtersveld it grows under unrelenting sun and aridity, so give it as much full light as possible during the growing season — strong sun keeps leaves compact and the low-spreading branches tight against the substrate. A 20–30% shade cloth helps through Japan's harshest midsummer weeks. Raise pots off the ground for airflow. Overwinter on a bright sunny window kept above 5°C and dry.
Watering
In active growth, water deeply once the substrate has dried completely, then let it dry out fully again — adapted to extreme Richtersveld aridity, this species is unusually overwatering-sensitive even within the genus, tighter than Ceraria namaquensis. Stay nearly dry through winter, with at most one light misting per month.
Substrate
Drainage first, inorganic-led. Akadama : Kanuma : pumice = 3:3:4, or push pumice to 2:3:5 for even faster drying. The low-spreading habit suits a shallow, wide pot more than a deep one.
Fertilizer & Supplements
A small pinch of slow-release at repotting, or a half-strength liquid feed once a month in active growth. Overfeeding pushes elongated branches that break the spreading form — keep doses very modest.
Temperature & Overwintering
Optimal 20–30°C with a 5°C minimum. The Richtersveld sits in winter-rainfall country, but as with the closely related Portulacaria afra the cultivation tradition treats it as a summer-grower, which is the convention adopted here. In Japan the combination of cold and indoor humidity makes 5°C the safe practical floor — damp soil with cold is the main failure mode.
Starting from Seed
Where to source seeds
Pre-sowing treatment
Soak seeds for about half a day (overnight) in a mix of a registered seed-treatment fungicide (Benlate or Daconil) and a plant tonic (Menedael; outside Japan, SUPERthrive or a chelated iron / seaweed extract works similarly), each diluted per label. Those still floating are likely past their prime; stock circulates in very small quantities and older seed often slips in.
Substrate
A fine-grained, near-sterile seedling mix: fine Akadama, fine Kanuma, and vermiculite in 1:1:1 parts. Sterilizing beforehand with boiling water or a microwave pass is worth the trouble — this species is unusually prone to damping-off.
Sowing method
Sow with no covering, or only the thinnest dusting of substrate so the seeds stay partly visible. Space them at least 1 cm apart so they don't clump on the surface.
Light & temperature
Bright shade, 22–28°C. Germination is uneven — some seeds break ground in two weeks, others take one to two months. Hold the heat steady on a mat and stay patient with stragglers.
Watering
Bottom-water with the level 1–2 cm up the pot. For the first 2–3 weeks, prioritize not letting things dry out, then drop the water level gradually once seedlings are stable. Seedlings are particularly rot-prone, so wean off bottom watering early.
Fertilizer
No feeding right after germination. Once true leaves emerge, give diluted liquid fertilizer at double dilution or weaker, once or twice a month. Seedling growth is extremely slow — don't push the dose.
From Germination to Repotting
Germination through true leaves
Continue bottom watering in bright shade.
Weaning off bottom watering
Phase out earlier than for C. namaquensis.
First repotting
In year 1–2, once root-bound, into a shallow wide pot.
Common Pitfalls
Mold & damping-off
- Cause: excess moisture, contamination, poor air movement
- Prevention: sterilize the substrate, refresh the bottom-water, and use a circulation fan
Etiolation
- Cause: insufficient light. In habitat, intense sun keeps the branches short and tight against the substrate, so weak light at the seedling stage shows up directly in the form
- Prevention: move LEDs closer right after germination, or shift the tray to bright shade outdoors
Seeds fail to germinate
- Cause: stale seed, insufficient warmth
- Prevention: source from reliable sellers and hold 22–28°C steady on a heat mat. Seed freshness matters more for this species than for most others, given how thinly it circulates
Notes
No notable toxicity reports, but treat the sap with general caution. As a Richtersveld endemic, prioritize reputable suppliers to avoid wild-collected stock.
