Giant Coneflower (Rudbeckia maxima): Dramatic Vertical Accent

Giant Coneflower: A Towering Native for Bold Garden Architecture

Rudbeckia maxima makes an unforgettable statement with its massive, smooth, sea-green basal leaves (up to 2 feet long) and towering flower stems reaching 6 feet tall. Atop these sturdy stalks sit distinctive blooms: short, drooping yellow rays surrounding a giant, upright, elongated brown cone. This architectural native of the southern U.S. brings strong vertical structure to meadows, native plantings, and the back of borders.

Unique Characteristics

The foliage alone is worth growing—large, paddle-shaped, powder-blue leaves form a striking clump 3–6 feet tall and 1–3 feet wide. The unusual flowers appear in summer and fall, attracting butterflies and songbirds. The seed heads provide winter interest and bird food. Drought tolerant once established.

Growing Conditions

• Light: Full sun to part shade
• Soil: Average, slightly heavy but well-drained
• Water: Medium moisture
• Growth Habit: Clumping, moderate grower

Care & Propagation

Sow seed in cold frame in early spring, or divide clumps in spring or fall. Low maintenance once established.

Potential Problems

Aphids, powdery mildew, leaf spots, smut, rust, slugs, snails. Generally minor.

Quick Reference

Height:	3–6 ft. (flower stalks to 6 ft.)
Spread:	1–3 ft.
Bloom Time:	Summer, Fall
Flower Color:	Yellow rays, giant brown cones
Foliage:	Large, sea-green, paddle-shaped
Native:	Yes (southern U.S.)
Uses:	Back of border, native gardens, meadows, cut flowers, vertical accent