A distinctive caudex plant with the caudex hidden underground and leaves bearing wavy, crinkled margins. Native to the arid regions of South Africa's Cape Province, this semi-tuberous member of the Apocynaceae produces a rough-skinned caudex from which slender, vining stems emerge, carrying small leaves with dramatically frilled edges. A historic species — a famous specimen in Austria is reputed to be the world's oldest potted plant — cultivated in Europe for centuries. Rarer in collections than its cousin edulis and a little more demanding, but the slow, patient process of fattening up its caudex over years is the whole point. POWO treats Fockea capensis Endl. as the accepted name, which this site adopts; the trade-familiar Fockea crispa K.Schum. is treated as a synonym.
Native climate
Rainfall is spread fairly evenly across the year. Overall mild, with a wide temperature range.
A broad-scale picture of the native range. Real growing spots — rock crevices, fog belts — can be milder.
Sources: climate & elevation WorldClim 2.1 (1970–2000) · occurrences GBIF · native range POWO · current weather Open-Meteo
Care
Light & Placement
From the scrublands of South Africa's Cape Province, it likes strong light but the frilled leaves are surprisingly delicate. In active growth, give it bright partial shade to direct sun outdoors and dial it in until the crinkled leaves stay short and tight. A 30% shade through peak Japanese summer prevents leaf scorch. Raise pots on a shelf for airflow, and after leaf drop overwinter indoors at a bright window, out of rain.
Watering
In active growth, water thoroughly after the substrate has fully dried, then let it dry again — that wet-dry rhythm fattens the caudex. Prolonged rain causes rot, so shelter under eaves. As autumn leaves drop, taper to dormancy; mist once or twice a month.
Substrate
Drainage above all, in an inorganic mix. Small-grain Akadama : Kanuma : pumice = 4:3:3 is a reliable baseline. A pinch of slow-release such as Magamp K helps early growth, and a taller pot improves wet-dry cycling and reduces rot.
Fertilizer & Supplements
A small amount of slow-release during active growth, plus a monthly dilute liquid feed (around twice the label dilution). Overfeeding etiolates the vines, softens the leaf frills, and leads to rot — prioritize caudex bulk over fast growth.
Temperature & Overwintering
Optimal 20–32°C with an 8°C winter floor — slightly more cold-sensitive than edulis. The vining stems drop leaves in autumn as it enters dormancy; let leaf color cue tapering of water, then overwinter dry on a bright indoor window.
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. Seeds that don't sink tend to germinate poorly.
Substrate
Use a separate seedling mix that's fine-grained and near-sterile: fine Akadama, fine Kanuma, and vermiculite in equal 1:1:1 parts. Sterilize the mix with boiling water or a quick microwave pass before sowing.
Sowing method
Sow with no covering, or only the thinnest dusting of substrate so the seeds remain partly visible. Space them at least 1 cm apart so they don't clump or overlap on the surface.
Light & temperature
Keep the tray in bright shade at a steady 25–30°C. Expect germination in 10–21 days. Germination depends heavily on seed freshness, and even fresh seed stays on the lower side.
Watering
Bottom-water with the level 1–2 cm up the pot. For the first 2–3 weeks, prioritize not letting things dry at all, then drop the level in steady stages once the seedlings have come up.
Fertilizer
No feeding right after germination. Once the true leaves emerge, give a heavily diluted liquid fertilizer once or twice a month — go lighter than the label suggests for safety.
From Germination to Repotting
Germination through true leaves
Continue bottom watering and avoid strong light.
Weaning off bottom watering
Wean off gradually over 1–2 months.
First repotting
In year 1 or 2, once the plant becomes root-bound.
Common Pitfalls
Mold & damping-off
- Cause: Excess moisture, contamination
- Prevention: Sterilize substrate, ensure ventilation
Etiolation
- Cause: Insufficient light
- Prevention: Move the LED closer right after germination, or move outdoors to bright shade
Seeds fail to germinate
- Cause: Stale seeds, insufficient temperature
- Prevention: Use fresh seeds and a heat mat
Notes
This is a vining species and will climb readily if given a support.
