Swamp sunflower

Helianthus angustifolius

Photo/Illustration: 
C. Dwayne Jones
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Swamp sunflower (Helianthus angustifolius)
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Genus:  Helianthus
A profusion of golden yellow flowers appears for two to three weeks starting in early autumn. Daisy-like flowerheads are 3 inches across with 15 to 20 yellow ray florets radiating from a flat-topped purple or dark brown cone. The entire plant looks like a giant flame, drawing the attention of gardeners and many species of butterflies, bees, and other nectar feeders.
Noteworthy Characteristics:  This tall U.S. native is great for a perennial border, meadow, or butterfly garden.
Care:  Grow in full sun and moist but well-drained, moderately fertile, humus-rich soil. Needs ample moisture. May require support.
Propagation:  Divide in spring or autumn. Root basal cuttings in spring. Or start from seed.
Problems:  Common: downy mildew, powdery mildew, canker, rust, and many fungal leaf spots. Also susceptible to damage from caterpillars, cutworms, beetles, and weevils.

Overview

Height
3 ft. to 6 ft.
Spread
3 ft. to 6 ft.
Growth Habit
Clumps
Growth Pace
Moderate Grower
Light
Full Sun Only
Moisture
Medium Moisture
Maintenance
Moderate
Characteristics
Attracts Birds,
Attracts Butterflies,
Native,
Showy Flowers
Bloom Time
Fall
Flower Color
Yellow Flower
Uses
Beds and Borders,
Cut Flower
Style
Meadow Garden
Seasonal Interest
Fall Interest
Type
Perennials

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