Central Asian ornamental allium with enormous loose open umbels of metallic lilac-violet star-shaped flowers — each head 20 cm across — on short sturdy stems. Spectacular and self-seeding once established.
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 | H6 | −20 °C to −15 °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 1–5 | −15 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant in sunny well-drained borders and gravel gardens — flowers May–June, the metallic flower heads catching low light beautifully
- Self-seeds reliably where conditions suit — gradually fills sunny well-drained ground over a few years
- Dried flower heads persist through summer and winter as architectural structure
- Excellent bee forage
Pet caution: Star of Persia 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 Star of Persia against your zones