A representative species of Tylecodon, native to the winter-rainfall belt of southern Africa from the Western, Northern and Eastern Cape into southern Namibia — ranging across Namaqualand, the Great Karoo and the Little Karoo. In Japan it is sold as warichii or under the kanji name kihōnishiki (奇峰錦). Plants reach about 60 cm tall, with grey-green to grey-brown stems studded all over with phyllopodia — the hardened, persistent bases of fallen leaves — from which slender cylindrical yellow-green leaves emerge in cool months and drop entirely through summer. Winter-growing, and one of the species moved from Cotyledon when Tölken erected Tylecodon in 1978. For Japanese growers, surviving the humid summer is the central challenge.
Native climate
Rain concentrates in the cool season, with a dry season of roughly 5 months. 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
In its native Namaqualand and Karoo — ~50–250 mm of rain per year, almost all in winter — mature plants grow on hilltops, ridges and gravelly slopes in unrelenting direct sun. During the autumn-to-spring growing season in Japan, give it as much full light as possible to keep the cylindrical leaves tight. The hard problem is summer placement for a winter-growing species: the priority is keeping the pot as cool and well-ventilated as possible. Move to bright shade out of direct sun (north-facing eaves or 50–70% shade cloth), raise on a bench, and run a circulation fan. Winter indoors above 5°C on a bright window is straightforward.
Watering
In autumn (September–October), once nighttime lows drop below ~20°C, restart with light watering and ramp up as new leaves push from the phyllopodia. Through the active season, water thoroughly when the substrate has dried. Stop when leaves yellow and drop in late spring — keep essentially dry through summer. Watering in midsummer because "the soil looks dry" is the single most reliable way to kill this species.
Substrate
Drainage first, inorganic-led. Akadama : Kanuma : pumice = 3:3:4, with pumice tuned higher to dry faster. The species has a relatively shallow root system for its height, so a shallower pot with strong airflow works as well as a deep one.
Fertilizer & Supplements
Liquid feed at double dilution once a month through the active season, or a pinch of slow-release at repotting. Sources cite 10–20 years to maturity; pushing fertilizer elongates branches and blurs the form.
Temperature & Overwintering
Optimal 15–25°C; above 35°C the plant slides into dormancy. Aim for a 5°C minimum — damp soil under cold is fatal. Summering this plant is harder than overwintering it, a trait shared across the genus: through summer, prioritize shade, ventilation and dry soil, and consider an air-conditioned room if your summers are oppressive.
Starting from Seed
Where to source seeds
links go directly to the product page; the rest are scientific-name searches. Stock fluctuates — verify availability on the destination site.
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 fail to sink are usually no longer viable. The seed is extremely fine and pale brown; viability drops quickly with age. Japanese grower reports range from 1-in-20 to near-100% — freshness is the biggest single factor.
Substrate
A separate seedling mix, fine-grained and near-sterile: fine Akadama, fine Kanuma, and vermiculite in 1:1:1, sterilized with boiling water or a microwave pass. A thin topping of coarse sand anchors the dust-fine seed.
Sowing method
Do not cover the seeds. Sprinkle them carefully onto a pre-moistened surface. Thin clumps after germination rather than trying to space dust-fine seed perfectly.
Light & temperature
Bright shade, 15–22°C. Heating to 25–30°C disrupts germination in this winter-grower. In Japan, the standard window is autumn sowing in September through November. Germination in 1–3 weeks.
Watering
Bottom-water 1–2 cm up the pot — the seeds are too small for top-watering. Drop the water level gradually once seedlings are established.
Fertilizer
None right after germination. Once true leaves emerge, a heavily diluted liquid feed once or twice a month. Seedlings are particularly slow even within the genus — no benefit to pushing the dose.
From Germination to Repotting
Germination through true leaves
Continue bottom watering, keep in bright shade.
Weaning off bottom watering
Phase out gradually over 1–2 months.
First repotting
In the first or second year, once root-bound, in autumn.
Common Pitfalls
Mold & damping-off
- Cause: excess moisture, contamination, poor airflow
- Prevention: sterilize the substrate, refresh the bottom-water, run a circulation fan
Etiolation
- Cause: insufficient light. The active winter season runs through low-sun months
- Prevention: run an LED close indoors, or move to bright shade outdoors. Weak light produces elongated leaves and widely-spaced phyllopodia that don't recover the compact form
Seeds fail to germinate
- Cause: stale seed, temperatures too high
- Prevention: use fresh seed at room temperature (15–22°C) without a heat mat — 25–30°C actively suppresses germination
Summer stall and rot
- Cause: watering during summer dormancy, or sitting in hot, humid, poorly-ventilated spots
- Prevention: cut water once leaves yellow in late spring; through summer prioritize shade and ventilation, and consider an air-conditioned room
Notes
All Tylecodon are strongly toxic; sap contains cotyledoside, a bufadienolide cardiac glycoside first isolated from this very species in the 1990s. Textbook causative species for livestock krimpsiekte ("shrinking disease"). Wear gloves and keep away from children and pets.
