Sunflower, Swamp

Swamp Sunflower (Helianthus angustifolius)
Swamp Sunflower is a bold, late-blooming native perennial known for its explosion of bright yellow daisy-like flowers in fall. Native to the Southeastern U.S., this tall and adaptable species thrives in moist soils but is surprisingly tolerant of drier conditions once established. Its late-season blooms provide critical nectar for migrating pollinators and vibrant fall color in meadows, rain gardens, and naturalized borders.

Key Characteristics

• Late-Season Pollinator Support
  Blooming from September through October, Helianthus angustifolius provides essential nectar and pollen for migrating monarchs, native bees, and butterflies when few other natives are flowering. It’s especially valuable in extending the pollinator season into autumn.

• Excellent Bird Habitat
  After flowering, the plant produces abundant small seeds that are relished by finches and other seed-eating birds. The tall stalks also provide perch sites and habitat structure in fall and winter gardens.

• Moisture-Loving but Drought-Tolerant
  Despite the name, Swamp Sunflower isn’t limited to wetlands. It thrives in medium to moist soils, including clay, and can handle seasonal drought once established. It’s ideal for rain gardens, streambank restoration, or any area with variable moisture.

• Tall and Showy for Naturalized Plantings
  Growing 5–8 feet tall, Swamp Sunflower is a striking backdrop in native borders or massed in meadow plantings. It also works well along fences, the back of pollinator beds, or at the edges of food forests and riparian zones.

• Fast-Growing and Spreading
  This species spreads by rhizomes and can form large colonies over time—excellent for erosion control and restoration, but best given space or managed with mowing in small gardens.

Product Details

• Native Range: Southeastern U.S., from Texas to the Carolinas
• Plant Life Cycle: Perennial
• Sun Requirements: Full sun
• Soil Requirements: Medium to wet; tolerates clay and periodic drought
• Mature Height: 5–8 feet
• Bloom Time: September–October
• Bloom Color: Bright yellow
• USDA Hardiness Zones: 6–9

Plant Swamp Sunflower in spring or fall in full sun. Water to establish, then let this resilient native thrive. It’s a pollinator powerhouse and seasonal showstopper that brings ecological value and golden drama to autumn landscapes.