ACG Plant Finder Tool

Prairie Thistle

Plant Information

Taxonomic Name: Circium discolor
Common Name: Prairie Thistle
Type: Biennial
Bloom Time: September to October
Height: 50-72 inches
Light Requirements: Full sun, Morning sun with afternoon shade
Soil Conditions: Tolerates periodic drought
Flower Color: Violet
Wildlife: Birds, Bees,
Special Characteristics:
  • Distinguish Prairie Thistle from Canadian Thistle, Prairie will have white underside