Tall sunflower relative grown for knobbly underground tubers. Cheerful late-summer yellow flowers; productive on poor ground.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–9 | −40 °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 3–9 | −34 °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
- Spreads from any tuber fragment left in the soil — site where its tendency to take over is acceptable
- Late flowers are excellent late forage for bees
Categories
Related plants
Cross-check Jerusalem artichoke (Sunchoke) against your zones