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White Cardinal Flower

Lobelia siphilitica 'Alba'

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White Cardinal Flower (Lobelia siphilitica 'Alba') at Oakland Nurseries Inc

Lobelia siphilitica 'Alba' flowers

Lobelia siphilitica 'Alba' flowers

(Photo courtesy of NetPS Plant Finder)

White Cardinal Flower (Lobelia siphilitica 'Alba') at Oakland Nurseries Inc

Lobelia siphilitica 'Alba' in bloom

Lobelia siphilitica 'Alba' in bloom

(Photo courtesy of NetPS Plant Finder)

Plant Height: 24 inches

Flower Height: 3 feet

Spread: 18 inches

Sunlight:  partial shade 

Hardiness Zone: 5a


This beautiful variety has beautiful bright white flower spikes that rise above medium green foliage; excellent in the natural shade garden or containers; this one maintains a good form throughout the season and is an excellent border planting

Ornamental Features:

White Cardinal Flower features showy spikes of white tubular flowers rising above the foliage from early to mid summer. The flowers are excellent for cutting. It's serrated pointy leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes:

White Cardinal Flower is an herbaceous perennial with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This is a relatively low maintenance perennial, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting hummingbirds and butterflies to your yard. It has no significant negative characteristics.

White Cardinal Flower is recommended for the following landscape applications;

  • General Garden Use
  • Mass Planting

Plant Characteristics:

White Cardinal Flower will grow to be about 24 inches tall at maturity extending to 3 feet tall with the flowers, with a spread of 18 inches. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 5 years.

This perennial should be grown in a location that is shaded from the hot afternoon sun. It prefers to grow in moist to wet soil, 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 plant can be propagated by division.

This is a selection of a native North American species, 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
Massing Garden
Flowers Attracts Wildlife
Ornamental Features
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