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Star-thistle
Centaurea solstitialis
In the United States:
Invasive
· also called Yellow Star-thistle, Golden Star-thistle, Yellow Cockspur
Listed as invasive. Check local regulations — several jurisdictions restrict planting.
Honeybees visit yellow star-thistle extensively for its abundant nectar and pollen, which provide a vital summer resource during periods of low forage availability. Peak bloom occurs in midsummer, yielding a light, mild-flavored honey prized for its clarity and subtle aroma. The plant prefers full sun and dry, well-drained soils but features spiny bracts that can injure eyes of grazing animals and handlers.
| Nectar | high |
|---|---|
| Pollen | high |
| Bloom (US) | June–September |
| Duration | ~2 months |
| Type | Perennial |
| Sun | full |