Architectural Mediterranean perennial grown for edible immature flower buds. Spectacular open flowers if harvest is missed.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 6–11 | −23.3 °C to 10 °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 2–7 | −10 °C and warmer | Plant tolerates down to this zone |
Growing notes
- Allowed to flower, the blue thistle heads are striking seasonal markers of midsummer
- Mulch heavily and protect crowns where winters drop below -10 °C
Categories
Related plants
Cross-check Globe artichoke against your zones