• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Great Blue Lobelia

Botanical Name
Lobelia siphilitica
Min Zone
4
Max Zone
9
Height
2 to 3 feet
Width
12 to 18 inches
Flowers
July to September: raceme of 2-lipped light to dark blue held atop sturdy stems
Light
Full sun to part shade
Soil
Moist to wet
Planting & Care
  • Needs constant, consistent moisture
  • Benefits from part shade in hot climates
  • Divide in spring
  • May self seed in optimum conditions
  • Excellent for naturalizing along streams, banks, swamps and low wooded areas
Problems
None serious
Varieties
  • Alba - white flowers

Upcoming Live Events
& Webinars


July 24, 2025
Ladies Night Out
Ebert's Greenhouse Village
Ixonia, WI

July 31 - August 10, 2025
Wisconsin State Fair
We Energies' Energy Park
West Allis, WI

Sept. 4, 2025
FREE WEBINAR
Fall Landscape Planting & Care
Register here


WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter to Win

The Birds & Blooms' Ultimate Gardening Guide  

ENTER NOW