Helianthus angustifolius
$27.00 / 2G
Swamp Sunflower ·
Description
Helianthus angustifolius, commonly known as Swamp Sunflower, is a herbaceous perennial valued for its yellow flowers during fall and summer. It typically matures 5–8 feet tall and 2.5–4 feet wide. Grow it in full sun to partial shade in moist, well-drained clay or loam soil. Its native range or documented parentage is North America. Flowers provide nectar to pollinators from July until the first frost. In the landscape, it works well in coastal, naturalized area, and butterfly garden. Once established, it shows useful tolerance to deer, poor soil, and salt.
Benefits
Supports a more active, living garden with flowers that pollinators can use. Fits naturally into Mid-Atlantic planting palettes and habitat-minded gardens.
Features
Helianthus angustifolius produces yellow flowers and provides cultivar-specific ornamental interest.
Usage/Use
Mixed border, pollinator garden, cottage garden, mass planting
| Helianthus angustifolius | |
| Swamp Sunflower | |
| No | |
| Best grown in full sun to part sun with average moisture. | |
| Full Sun to Part Sun; Average moisture; Well-drained average garden soil. Water regularly the first season, then adjust to plant preference. | |
| North America | |
| Locally Native | |
| Yes | |
| North America | |
| Yes |
| 4 - 9 | |
| Hardy in USDA Zones 4–9; protect roots during establishment. | |
| Full Sun | |
| Loam | |
| 6 - 8 | |
| 1 - 3 ft | |
| 1 - 3 ft | |
| Medium | |
| 1 - 3 ft |
| Yes | |
| Longtime | |
| Mid-Summer | |
| None | |
| Yellow | |
| Green | |
| Green foliage | |
| Birds from Seed | |
| Native Garden | |
| Flower Interest | |
| Sun-Loving Perennials | |
| Upright | |
| Average | |
| Fall, Spring, Summer |
| Average Water | |
| Well-drained | |
| Water deeply during establishment; after established, water based on rainfall and soil moisture. | |
| Low | |
| Water regularly during establishment, mulch to conserve moisture, and cut back/prune at the proper seasonal time. |