Swamp Sunflower

Swamp Sunflower

Swamp Sunflower is a vigorous native perennial that produces a spectacular display of bright golden-yellow flowers from late summer through fall, providing one of the longest-lasting floral displays of the season. Masses of daisy-like blooms with dark brown centers cover the tall, branching stems just as many other perennials begin to fade. Its narrow, willow-like green foliage gives the plant a fine texture that contrasts beautifully with broader-leaved companions, while the nectar-rich flowers attract bees, butterflies, and other beneficial pollinators. As the season progresses, the seed heads become an important food source for songbirds.

Its tall, upright habit makes Swamp Sunflower an excellent choice for naturalized landscapes, pollinator gardens, rain gardens, meadow plantings, and the back of perennial borders. Despite its common name, it performs well in average garden soils but truly excels in consistently moist locations where many flowering perennials struggle. Its impressive height and abundant blooms create a dramatic backdrop that extends seasonal color well into autumn.

Typically growing 5 to 7 feet tall and 2 to 4 feet wide, Swamp Sunflower thrives in full sun and moist, well-drained to wet soils. Once established, it tolerates periods of drought but performs best with consistent moisture. Its vigorous growth and dependable late-season flowering make it a valuable addition to wildlife-friendly and native landscapes.

Care Instructions:

Planting: Plant in full sun in moist, well-drained to wet soil for best growth and flowering.
Soil: Adapts to clay, loam, and sandy soils and performs best with consistent moisture.
Watering: Water regularly during establishment. Once established, it tolerates short dry periods but thrives in moist soils.
Fertilizing: Fertilizer is rarely needed. Apply compost in spring if desired.
Pruning: Pinch stems in early summer to encourage a bushier habit if desired. Cut plants back after frost or in late winter.
Spacing: Space plants 24–36 inches apart.
Maintenance: Divide every few years if clumps become crowded. Taller plants may benefit from support in rich soils or windy locations.
Companion Plants: Joe-Pye Weed, Blue Flag Iris, Switchgrass

Its towering habit, exceptional fall bloom, and outstanding ecological value make Swamp Sunflower one of the best native perennials for extending color and supporting wildlife late in the growing season.

Landscape Solutions:

Planting: Plant in full sun in moist, well-drained to wet soil for best growth and flowering.
Soil: Adapts to clay, loam, and sandy soils and performs best with consistent moisture.
Watering: Water regularly during establishment. Once established, it tolerates short dry periods but thrives in moist soils.
Fertilizing: Fertilizer is rarely needed. Apply compost in spring if desired.
Pruning: Pinch stems in early summer to encourage a bushier habit if desired. Cut plants back after frost or in late winter.
Spacing: Space plants 24–36 inches apart.
Maintenance: Divide every few years if clumps become crowded. Taller plants may benefit from support in rich soils or windy locations.
Companion Plants: Joe-Pye Weed, Blue Flag Iris, and Switchgrass