Swamp sunflower (Helianthus angustifolius) hee-lee-AN-thus an-gus-tih-FOE-lee-us 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 Bees, Attracts Butterflies, Attracts Song Birds, Native, Showy Flowers Bloom Time Fall Flower Color Yellow Uses Beds and Borders, Cut Flower Style Meadow Garden Seasonal Interest Fall Interest Type Perennials