Rudbeckia maxima is a bold, architectural perennial valued as much for its dramatic foliage as for its striking flowers. Large, powdery blue-green leaves form an impressive basal rosette, providing strong structure early in the season. In midsummer, tall, sturdy stems rise well above the foliage, topped with classic black-eyed-Susan-style flowers featuring drooping yellow rays and oversized dark brown cones. The effect is airy yet commanding, making this species a standout in prairie plantings, naturalistic borders, and perennial meadows.
- Height: 180-240 cms (6-8 ft)
- Spread: 60-90 cm (2-3 ft)
- Cold Hardiness: Zone 4
- Sun or Shade: minimum five hours of direct sun
- Bloom Time: mid to late summer
- Leaf Colour: blue green
- Bloom Colour: yellow with brown cone
- Critter Resistance: deer
- Nature Attraction: butterflies, bees and seed eating birds
Growing and Maintenance Tips
This is a tough, low-maintenance perennial that thrives in full sun and well-drained soil. While adaptable to average garden conditions, Rudbeckia maxima performs best with consistent moisture during establishment and tolerates periods of drought once mature. Rich soil will encourage taller growth, but overly fertile conditions may require discreet staking in exposed sites. Deadheading is optional, as the prominent seed cones provide excellent fall and winter interest and can self-sow modestly. Cut back stems in late fall or leave standing for winter structure and wildlife value.
