Yellow blooms of Helianthus angustifolius (Swamp Sunflower).
Buckeye butterfly (Junonia sp.) perched on young flower buds of Helianthus angustifolius (Swamp Sunflower).
Young foliage and flower buds of Helianthus angustifolius (Swamp Sunflower).

Helianthus angustifolius (Swamp Sunflower) Unity Grown

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Helianthus angustifolius is a tall, upright, clump-forming perennial wildflower native to the eastern half of the United States. Growing to between five and eight feet tall, swamp sunflower produces large heads of small, sunflower-type blooms from late summer until the first hard frost, and these blooms are valuable to a wide variety of pollinators. In the fall, flower heads turn to rich seed, which is prized by a variety of songbirds and other wildlife.

Helianthus angustifolius performs best in a good variety of wet, acidic soils, in full sun, and can most often be found in nature in wetlands and near bodies of water. Aside from swamps, swamp sunflower's salt tolerance also makes it a great pick for planting in coastal gardens as well.

Native to Maryland, Native to U.S., Straight Species, and Native to Eastern Shore
Mature Plant Height: Very Tall: 73" and up
Sun (6+ hours)
Soil Moisture: Wet
Soil Type: Acidic, Loam, and Wide Tolerance
Bloom Time: Summer and Fall
Flower Color: Yellow
Foliage color: Green
Features: Attracts Birds, Attracts Butterflies, Attracts Pollinators, Attracts Wildlife, Erosion Control, Fall Color, and Host Plant for Butterflies or Moths
Tolerances: Black Walnut Tolerant, Clay Soil Tolerant, Deer Tolerant, Rabbit Tolerant, Flood Tolerant, Salt Tolerant, and Wet Soil Tolerant
Garden Type: Pollinator Garden, Meadow, Rain Garden, Small Space, and Wetland Restoration

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