Sawtooth Sunflower (Helianthus grosseserratus): Well-Behaved Native for Borders

Sawtooth sunflower (Helianthus grosseserratus) has abundant yellow daisy flowers from late summer into fall. Dark green narrow leaves with leathery gloss. Well-behaved, forms thick slowly expanding clump. Can reach 10+ feet.

Noteworthy Features

Adaptable to various conditions. Contrasts nicely with ornamental grasses in borders even when not in bloom. Native Maine to North Dakota, south to Virginia, west to Oklahoma.

Culture & Propagation

Support if necessary. Moderately fertile, moist but well-drained soil, full sun. Sow seed in containers spring in cold frame. Divide spring/autumn. Basal cuttings spring.

Problems

Downy/powdery mildew, canker, rust, fungal leaf spots. Caterpillars, cutworms, beetles, weevils.

Quick Reference

• Height: 6–10 ft.
• Growth Habit: Clumps
• Growth Pace: Moderate
• Light: Full sun only
• Moisture: Medium
• Maintenance: Moderate
• Bloom Time: Late summer to fall
• Flower Color: Yellow
• Attributes: Native, attracts songbirds & butterflies
• Uses: Beds, borders, cut flowers, meadow gardens