• Blue Cardinal Flower with long stems full of blue blooms
  • Close up of Blue Cardinal Flower pollinator perennial attracting hummingbird
  • Blue Cardinal Flower close up showing off light blue flowers atop long stem
  • Close up of blue, trumpet-shaped flowers of Blue Cardinal Lobelia Flower

Images Depict Mature Plants

Great Blue Lobelia

Lobelia siphilitica 'Great Blue'

Great Blue Lobelia are irresistible to Hummingbirds and Butterflies! Their bright blue flowers bloom in late summer and are pollinator magnets. They are hardy perennials that are well-known for their ease of care and versatility.

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Great Blue Lobelia for Sale Online

Great Blue Lobelia, also known as Lobelia siphilitica, is a pollinator perennial known for its beautiful bright blue flowers. The trumpet-shaped flowers sit atop long stems, attracting butterflies and hummingbirds. It is a hardy native perennial with large, bright green foliage and blue blooms that appear mid to late summer. The Blue Cardinal Flower thrives in a variety of conditions and can tolerate part sun or part shade and moisture-rich soil.


Growzone: 3-9 Great Blue Lobelia Hardiness Zones 3-9
Hardiness Zone: 3-9
Mature Height: 2 to 4 Feet
Mature Width: 1 to 2 Feet
Classification: Flowering Perennial
Habit: Upright
Flower Color: Blue
Attracts: Hummingbirds, Butterflies
Soil Condition: Prefers moist soil; can tolerate mild flooding
Water Requirements: Water frequently, do not let dry out

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