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
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

Blue Cardinal Flower

Lobelia siphilitica 'Great Blue'

Blue Cardinal Flower plants 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.

Growzone: 3-9

As Low As: $18.95

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1. Choose Size & Quantity
Size Price Quantity
1 Gallon Pot $18.95
2. Choose Recommended Add-Ons
Product Price Quantity
Espoma Bio-Tone Starter Plus
4 LB Bag
$16.95
Espoma Flower-Tone
4 LB Bag
$16.95

California Residents: This product can not be shipped to California at this time due to shipping restrictions.

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Blue Cardinal Flower Plants for Sale Online

The Blue Cardinal Flower or 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.


Growing 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
This Plants Growzone: 3-9 Blue Cardinal Flower Hardiness Zone

Additional Information

Blue Cardinal Flower Perennials

The Lobelia plant, also commonly referred as the Cardinal Flower is definitely a show stopper as far as perennials go. Butterflies and hummingbirds absolutely love this plant. It is a bright blue beacon for hummingbirds, if you plant it, they will find it. 


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