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Milk Thistle
Silybum marianum
In the United States:
Invasive
· also called blessed milkthistle
Listed as invasive. Check local regulations — several jurisdictions restrict planting.
Honeybees forage heavily on milk thistle for its abundant nectar and pollen from the striking purple flower heads, yielding a light, mild-flavored honey. Peak bloom occurs in midsummer in temperate zones, serving as a reliable late-season forage source. The spiny leaves and stems necessitate careful handling with gloves, and the plant self-seeds vigorously in disturbed soils.
| Nectar | high |
|---|---|
| Pollen | high |
| Bloom (US) | July–August |
| Duration | ~45 days |
| Type | Perennial |
| Sun | full |