Coarse-leaved perennial grown for its pungent roots. Once established, near-impossible to eradicate from a planting.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 2–9 | −45.6 °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 2–9 | −40 °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
- Any root fragment will regrow — choose your planting site carefully and consider a sunken container
- Lift roots in autumn after the first frosts for the strongest flavour
- Always consult a qualified medical or herbal practitioner before medicinal use.
Pet caution: Horseradish is listed as potentially harmful to cats and/or dogs. Keep pets from grazing on it, and contact a vet if you suspect your animal has eaten some.
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Related plants
Cross-check Horseradish against your zones