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perennial

Cardinal Flower Lobelia

Lobelia cardinalis

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Cardinal Flower Lobelia (Lobelia cardinalis) at Bachman's Landscaping

Cardinal Flower Lobelia flowers

Cardinal Flower Lobelia flowers

(Photo courtesy of NetPS Plant Finder)

Cardinal Flower Lobelia (Lobelia cardinalis) at Bachman's Landscaping

Cardinal Flower Lobelia in bloom

Cardinal Flower Lobelia in bloom

(Photo courtesy of NetPS Plant Finder)

Height:  4 feet

Spacing:  20 inches

Sunlight:  partial shade 

Hardiness Zone:  3

Ornamental Features

Cardinal Flower Lobelia features showy spikes of scarlet flowers rising above the foliage from mid summer to early fall. The flowers are excellent for cutting. Its pointy leaves remain dark green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Cardinal Flower Lobelia is an herbaceous perennial with an upright spreading habit of growth. Its relatively coarse texture can be used to stand it apart from other garden plants with finer foliage.

This plant will require occasional maintenance and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting butterflies and hummingbirds to your yard. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Self-Seeding

Cardinal Flower Lobelia is recommended for the following landscape applications;

  • Mass Planting
  • General Garden Use
  • Water Gardens
  • Bog Gardens

Planting & Growing

Cardinal Flower Lobelia will grow to be about 3 feet tall at maturity, with a spread of 18 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 20 inches apart. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 3 years.

This plant should be grown in a location that is shaded from the hot afternoon sun. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. It is not particular as to soil pH, but grows best in rich soils. It is somewhat tolerant of urban pollution. This species is native to parts of North America, and parts of it are known to be toxic to humans and animals, so care should be exercised in planting it around children and pets.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Massing  Garden  Bog  Water 
Applications
Flowers  Attracts Wildlife 
Ornamental Features