University of Illinois Extension
Prairie Dock (Silphium terebinthinaceum) - Wildflowers

Directory of Wildflowers

Prairie Dock
Silphium terebinthinaceum

Prairie Dock (note very long flower stalks)
Prairie Dock (note very long flower stalks)

Quick Profile

Exposure
Full Sun
 
Mature Height
4 - 9 Feet
 
USDA Hardiness Zones
4 - 9 
 
Native To:
Illinois
Indiana
Iowa
Michigan
Missouri
Ohio
Wisconsin
 
Soil Conditions
Moist, Well-Drained
 
Bloom Color
Yellow
 
Bloom Season
August - October
 

Features

Yellow, daisy-like flowers on very long flower stalks. Large leaves at the base of the plant (up to 2 feet long).

Culture

Full sun; moist, well drained soils.

Notes

Found in prairies. This plant has a taproot which makes it difficult to transplant.