Helianthus angustifolius, commonly known as Swamp Sunflower, is a tall, late-blooming native perennial that brings bold color and pollinator activity to the fall garden. Growing 5 to 7 feet tall, this clump-forming plant features narrow, lance-shaped leaves and produces masses of bright yellow daisy-like flowers from late summer into fall. It thrives in moist to wet soils and full sun, making it a standout in rain gardens, native meadows, or along pond and stream edges. Swamp Sunflower is a favorite of bees, butterflies, and birds, offering essential habitat and nectar late in the season.

Why choose Swamp Sunflower:

• Late-season color: Blooms from late summer through fall when few other natives are in flower

• Pollinator magnet: Attracts bees, butterflies, and supports beneficial insects

• Tall and bold: Adds vertical drama and structure to native plantings

Cultivating tips:

• Sun exposure: Requires full sun for best flowering and upright growth

• Soil needs: Prefers moist to wet soils; tolerates clay and seasonal flooding

• Maintenance: Cut back after bloom; may need staking in rich soils or exposed sites

Designs for your garden:

• Rain gardens: Thrives in wet areas and helps absorb excess runoff

• Meadow plantings: Pairs well with grasses and other fall-blooming natives

• Wildlife gardens: Provides food and shelter for pollinators and birds

Ecological benefits:

• Native value: Offers critical late-season nectar for pollinators

• Bird support: Seed heads feed songbirds in fall and winter

• Biodiversity boost: Enhances habitat complexity in wetland-edge or prairie plantings