Silphium terebinthinaceum (Prairie Dock)

Noted for its spectacular foliage and profuse blooms, Silphium terebinthinaceum (Prairie Dock) is a tall herbaceous perennial forming a basal rosette of huge, oblong to heart-shaped, dark green leaves, up to 2 ft. long (60 cm). From midsummer to mid-fall, sturdy, upright, branching stems bear a profusion of bright yellow, daisy-like flowers, 3 in. across (7 cm). The flowers resemble small sunflowers with their yellow rays surrounding a yellow central disk. The blossoms are followed by large seeds that are favored by birds. This species is also commonly called Prairie Rosinweed because its stems exude a gummy, bitter resin when broken or cut. Prairie Dock is a great choice for prairies or other natural plantings.

• Grows up to 5-9 ft. tall (150-270 cm) and 2-3 ft. wide (60-90 cm). Will self-sow prolifically.
• Performs best in full sun in average, medium moisture, well-drained soils. Tolerates poor soils. The flower stalks can be floppy in shady conditions
• No serious pest or disease issues.
• Great for prairies or meadows, cottage gardens, wildflower gardens, and beds and borders.
• Propagate by sowing unstratified seed in fall or stratified seed in spring.
• Native to central North America.