Prairie Dock (Silphium terebinthinaceum)

Prairie Dock (Silphium terebinthinaceum)

Huge elephant-ear leaves grow in short clumps, sending giant stalks high into sky that burst with yellow flowers. A very unique plant and a welcome addition to any garden–whether it’s just one specimen plant, or a backdrop of tall stalks. Birds eat the seeds.


Sun:    Full Sun, Part Shade
Moisture:    Medium-Wet, Medium-Dry
Height:    9 feet
Blooms:    July, Aug, Sept
Color:    Yellow
Spacing:    2-4′
Zones:    4-8′
Benefits:    Butterflies, Pollinators, Birds

Design Tips

Prairie Dock is perfect for adding unobtrusive vertical appeal in gardens because only the stalks and flowers reach above the garden while the big leaves are concentrated in a clump near the ground. Great for scattering in small groups of individually throughout the middle of an otherwise short garden.

Companion Plants

Prairie Dropseed
Royal Catchfly
Meadow Blazing Star
Prairie Blazing Star