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

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: $22.95

1. Choose Size & Quantity
Size Price Quantity
1 Gallon Pot $22.95
2. Choose Recommended Add-Ons
Product Price Quantity
Espoma Bio-Tone Starter Plus
4 LB Bag
Espoma Flower-Tone

California Residents: This product can not be shipped to California at this time. Browse products that can be shipped to California here.

Dormancy Notice: This plant, like many others, enters dormancy or semi-dormancy in the late fall through early spring. *THIS PLANT IS NOT DEAD. It is completely healthy but upon receiving the plant, you may notice it exhibits fewer leaves, discoloration, or complete leaf drop. This is normal and essential to the plant's health. In fact, planting during dormancy promotes root growth, giving your plant a better start for spring, when new foliage will begin to grow.

Blue Cardinal Flower Plants for Sale Online

The Blue Cardinal Flower (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.

  • Low maintenance
  • Deer and rabbit resistant
  • Good for summer bouquets
  • Attracts pollinators

About Your Blue Cardinal Flower

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. 

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

Customer Reviews