Blue Vervain (Verbena hastata)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Wildflowers

Blue Vervain
Verbena hastata

Blue Vervain
Blue Vervain
 
Features

Small, purple to blue flowers blooming a few at a time, on a pencil-thin spike.

 
 
Culture
Full sun; moist, well drained to wet soils. 
 
Mature Height
2-6 Feet
 
Native To:
Illinois
Indiana
Iowa
Michigan
Missouri
Ohio
Wisconsin
 
USDA Hardiness Zone
3 - 8 
 
Bloom Color
Blue
Purple
 
 
Bloom Season
July - September
 
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 thickets and along roadsides. This plant will spread through self seeding and slowly through underground rhizomes.