European perennial herb that yielded the chemistry behind metformin — the most-prescribed type-2 diabetes drug in the world. Pale lilac pea flowers attract bees.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 4–8 | −34.4 °C to −6.7 °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 4–8 | −29 °C to −1 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 1–4 | −15 °C to 5 °C | Plant tolerates down to this zone |
Growing notes
- Toxic to livestock — particularly cattle and sheep. Do not plant in or near pastures.
- Listed as an invasive weed in parts of the US — check local rules
- Major bee-forage plant; non-toxic to bees that feed on its nectar
- Always consult a qualified medical or herbal practitioner before using any plant medicinally
Categories
Related plants
Cross-check Goat's rue against your zones