Cliff stonecrop
Hylotelephium cauticola · Crassulaceae
📷 KENPEI · CC BY-SA 3.0
The gardener's calendar
Cliff stonecrop is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Foliage
- Evergreen, succulent and gray-blue
- Flowering
- August to September, pink or red flowers
- Mature size
- Approximately 20 cm in height
- Hardiness
- Very hardy, tolerates down to -15°C
- Origin
- Japan (Honshu and Hokkaido islands)
- Growth
- Slow to moderate
- Soil type
- Well-draining, light, poor soil
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Hylotelephium cauticola: extreme drought, full sun, very well-draining soil (fine gravel, perlite). Vigorous succulent that turns deep red under direct UV.
The common mistake
Using standard irrigation systems: causes complete rosette rot within weeks.
The pro's trick
Pinch back shoots in June to force lateral branching—stems stay shorter, denser, and August/September flowering is more impressive.
Care
Moderate watering
Japanese sedum is an extremely frugal succulent. Water moderately during the growing season (spring-summer), approximately once a week depending on conditions. Drastically reduce watering in winter and let the soil dry completely between waterings to prevent root rot.
Sun exposure
Choose a location in full sun (minimum 6 hours) to achieve beautiful gray-blue coloring and abundant flowering. This plant also tolerates partial shade, but will be less compact and less floriferous. Avoid prolonged dense shade.
Well-draining soil
Use very draining potting mix: cactus-succulent blend or light potting soil enriched with perlite and coarse sand. Poor, dry soil suits this species perfectly. Avoid any rich or permanently moist substrate.
Pruning and cleanup
Japanese sedum requires no regular pruning. Simply remove faded flowers in late autumn and eliminate dead or damaged leaves to aerate the clump and maintain a beautiful compact shape.
Light fertilizing
This sedum is not demanding. A single application of highly diluted fertilizer (for succulents) in spring is more than enough. Excess nitrogen promotes soft foliage at the expense of compact structure and coloring.
Hardiness and prevention
Japanese sedum is very resistant to diseases and pests. The main risk is rot from excess moisture or poorly drained soil. Ensure good air circulation and perfect drainage to prevent any fungal issues.
Did you know?
Japanese sedum (Hylotelephium cauticola) is called 'hollow-stemmed sedum' in reference to its particular stem structure. This alpine plant was traditionally grown in Japanese mountain gardens and ranks among the most decorative sedums for rock gardens and green roofs, thriving in extreme conditions where few plants prosper.
Where to buy it
Plant in spring, once all risk of frost has gone. Pick a plant with healthy foliage and roots that are not exposed. Best time: from April to June.
Add this plant to my garden →Plants from the same family
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Tips generated and checked by Viridia — adapt them to your local climate.