Tubular-flowered perennial with rosy-red blossoms. Roots are a major kidney and blood tonic in TCM, used both raw and prepared with different effects.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 6–9 | −23.3 °C to −1.1 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H6 | −20 °C to −15 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 6–9 | −18 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 2–5 | −10 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Despite the common name and superficial resemblance, Rehmannia is not closely related to true foxglove (Digitalis) and lacks its cardiac glycosides
- Always consult a qualified medical or herbal practitioner before using any plant medicinally
Categories
Related plants
Cross-check Chinese foxglove (Sheng di huang) against your zones