Prairie Dock (Silphium terebinthinaceum)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Wildflowers

Prairie Dock
Silphium terebinthinaceum

Prairie Dock (note very long flower stalks)
Prairie Dock (note very long flower stalks)
 
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.  
 
Mature Height
4-9 Feet
 
Native To:
Illinois
Indiana
Iowa
Michigan
Missouri
Ohio
Wisconsin
 
USDA Hardiness Zone
4 - 9 
 
Bloom Color
Yellow
 
 
Bloom Season
August - October
 
Soil Conditions
Moist, Well-Drained
 
 
Exposure/Light Requirements
Full Sun
 
 
Pests and Problems

Environmental Damage


Additional pests and problems that may affect this plant:

No serious insect or disease problems.
 
Additional Notes

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