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Blue Cardinal Flower

Category:

A wonderful form with true light blue flower spikes, excellent in the shade garden or containers; maintains a good form throughout the season and is excellent in a border planting

Characteristics

Species:
siphilitica
Average Landscape Height:
24 inches (3 feet with the flowers)
Average Landscape Width:
18 inches
Genus:
Lobelia
Branching:
herbaceous
Plant Form:
upright spreading
Canopy:
low
Growth Rate:
fast
Pruning:
spring cleanup
Spacing:
16 inches
Flower Color:
powder blue
Flower Form:
tubular
Flower Period:
from early to mid summer
Summer Foliage Color:
green
Maximum Light:
partial shade
Minimum Light:
partial shade
Maximum Moisture:
wet
Minimum Moisture:
moist
Pollution Tolerance:
medium

Ornamental Features

Blue Cardinal Flower features showy spikes of powder blue tubular flowers rising above the foliage from early to mid summer. The flowers are excellent for cutting. Its pointy leaves remain green in color throughout the season.

Landscape Attributes

Blue 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.

Planting & Growing

Blue 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. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 16 inches apart. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 5 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant should be grown in a location with partial shade or which 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 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. It can be propagated by division.

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