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Common Buckthorn
Rhamnus cathartica
In the United States:
Invasive
· also called European buckthorn, purging buckthorn
Listed as invasive. Check local regulations — several jurisdictions restrict planting.
Small yellow-green flowers appear in clusters during spring and supply nectar and pollen to honeybees. Bloom is relatively brief and occurs on dioecious plants. The shrub tolerates a wide range of soils and light levels from full sun to moderate shade.
| Nectar | low |
|---|---|
| Pollen | low |
| Bloom (US) | April–June |
| Duration | ~3 weeks |
| Type | Perennial |
| Sun | partial |
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