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Swamp Sunflower
Helianthus angustifolius
In the United States:
Native
· also called swamp sunflower, narrow-leaved sunflower
Honeybees visit swamp sunflower for its abundant late-season nectar and pollen, which supports colony buildup for winter. Peak bloom occurs from August to October, providing a vital resource when other flowers are scarce. This tall perennial (up to 8 feet) may require staking in exposed sites and prefers moist soils, though it tolerates average conditions; it is not invasive.
| Nectar | high |
|---|---|
| Pollen | high |
| Bloom (US) | September–November |
| Hardiness zones | 6-9 |
| Duration | ~2 months |
| Type | Perennial |
| Sun | full |