TCM longevity herb taken from prepared (cured) tuberous root. Climbing perennial related to Japanese knotweed.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 5–9 | −28.9 °C to −1.1 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 5–9 | −23 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 1–5 | −15 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Significant hepatotoxicity risk — multiple case reports of liver injury, particularly with raw or unprepared root. Only properly processed root should be used.
- Closely related to invasive Japanese knotweed — confirm species and check local invasiveness rules before planting
- Always consult a qualified medical or herbal practitioner before using any plant medicinally
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Related plants
Cross-check He shou wu (Fo-ti) against your zones