Lobelia speciosa 'Fan Blue'

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Photo Courtesy of Walters Gardens, Inc.
 Series Name: Fan Series
Common Name: Cardinal Flower
Common Name (Alternative): Hybrid Lobelia

A fantastic new blue selection of Cardinal Flower! 'Fan Blue' produces numerous dense spikes of intense blue-violet blossoms on compact, strictly upright plants similar to L. cardinalis. Members of the Fan Series typically have an earlier bloom time than the species, beginning in midsummer and continuing into fall. Multiple award winner.

Lobelia is an excellent border plant for moist locations and is a hummingbird magnet. It also attracts butterflies and swallowtails.

Origin: Native Cultivar


  28 Inches
  14 Inches
Flower Color:
  Blue shades
Foliage Color:
  Green shades
Hardiness Zone:
Find Your Zone
Sun or Shade?:
  Full sun (> 6 hrs. direct sun)
  Part shade (4-6 hrs. direct sun)
Wet or dry?:
  Average water needs
  Consistent water needs
Want to see wings?:
  Attracts butterflies
  Attracts hummingbirds
  Attracts songbirds
Need critter resistant plants?:
  Deer resistant
  Rabbit resistant
How fast should it grow?:
When should it bloom?:
  Late summer
  Early fall
How's your soil?:
  Poor Soil
  Average Soil
  Fertile Soil
Sweet or Sour Soil?:
  Acidic Soil (pH < 7.0)
  Neutral Soil (pH = 7.0)
  Alkaline Soil (pH > 7.0)
What's your garden style?:
  Rain Garden
  Water Garden


Bog plant
Border plants
Cut flower or foliage
Mass Planting

Homeowner Growing & Maintenance Tips:

The perfect plant for damp locations such as near ponds or low-lying areas, Lobelia will easily adapt to 'wet feet' but can also tolerate well-drained soils. L. speciosa is more adaptable than other Lobelias to various soil types and moisture levels. If enough moisture is available, it will thrive in the sun. In drier soils, it should be planted in part shade. Deadheading spent blooms will improve the overall appearance of the plant and may promote reblooming. It's a good idea to cut this plant back in the spring instead of the fall, since the foliage will help protect the root zone in the winter. Mulch is also recommended.


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While every effort has been made to describe this plant accurately, please keep in mind that the height, bloom time, and color may differ in various climates throughout the country. The description of this plant was written based on our experience growing it in Michigan (USDA hardiness zone 5) and on numerous outside resources.