Common Name: black-eyed Susan
Type: Herbaceous perennial
Zone: 3 to 9
Height: 2.00 to 3.00 feet
Spread: 1.00 to 2.00 feet
Bloom Time: June to September
Bloom Description: Yellow rays with black center disk
Sun: Full sun
Water: Dry to medium
Suggested Use: Naturalize, Rain Garden
Tolerate: Deer, Drought, Clay Soil, Dry Soil, Air Pollution
Easily grown in average, dry to medium, well-drained soil in full sun. Tolerates hot and humid summers and some drought. Tolerates light shade, but best in full sun. Deadhead to prolong bloom. Divide when clumps become overcrowded. Plants do not come true from seed (must be vegetatively propagated). Some nurseries sell seed-grown plants, however, as Goldsturm strain.
This coneflower cultivar is an upright, rhizomatous, clump-forming perennial which typically grows 2-3' tall. Features large, daisy-like flowers (3-4" across) with deep yellow rays and dark brownish-black center disks. Flowers appear singly on stiff, branching stems in a prolific, long-lasting, mid-summer-to-fall bloom. Oblong to lanceolate, dark green foliage. Good fresh cut flower.
A common problem of this cultivar is angular leaf spot caused by a bacterium. The disease causes brown or black angular spots on the leaves which can expand to blacken the whole leaf. Infection begins on the lower leaves and moves up the plant. Rudbeckias are also susceptible to septoria leaf spot and powdery mildew.
Mass in bold drifts in the perennial border, cottage garden, prairie, meadow or naturalized area. Provides excellent bloom and color for late summer.