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Louisiana Canna Canna glauca

Other Common Name(s):

Phonetic Spelling
KAN-uh GLAW-kuh
Description

Canna Glauca is a species of the Canna genus, a family of large tropical plants that produce gladiolus-like flower spikes in summer. The flowers of Canna Glauca can be red, salmon pink, yellow, or burnt orange and sit atop tall erect stems that are sheathed in large paddle-shaped leaves. The foliage is also very colorful and allows the plant to retain ornamental interest when not in flower. Because the leaves are so large, you should avoid placing the plant where it would be subject to high winds. Canna Glauca, like the Canna genus, is a herbaceous perennial that grows best in moist, organically rich, well-drained soils in full sun or partial shade (it cannot grow in full shade).

To propagate the plant, remove the flowering stems after blooms have passed and, in the fall after the first frost, cut the plant back to the ground. You can leave the rhizomes, or bulbs, in the ground if your winters are temperate (usual in USDA zones 7 through 10); however, if winters include freezes, treat the plant as an annual and dig up the rhizomes in fall and store them in a dry medium such as peat or vermiculite in a cool dry location that does not get below 40 degrees F over the winter. In the spring, after the last frost, plant the rhizome 4 to 6 inches deep. If the plant has been grown in a container, you can submerge the container in ponds or water gardens with the crowns under no more than 8” of water. Lift the containers in fall, cut back the plant tops and overwinter the containers in cool, dry, frost-free locations until spring.

Canna do well in water and can be grown in up to 6 inches of water during the summer. If this is your strategy, you should gradually introduce the plant to aquatic life. Keep in mind that rhizomes may rot in poorly drained wet soils and the plants are susceptible to damage from aster yellows. Japanese beetles, caterpillars, slugs and snails that are known to chew on the foliage. 

 

Cultivars / Varieties:
  • 'Endeavor'
  • Erebus
  • 'Ra'
  • 'Taney'
Tags:
#tropical#bulb#water garden#rain garden#fall flowers#colorful leaves#fall interest#tropical perennial#summer flowers#perennials
 
Cultivars / Varieties:
  • 'Endeavor'
  • Erebus
  • 'Ra'
  • 'Taney'
Tags:
#tropical#bulb#water garden#rain garden#fall flowers#colorful leaves#fall interest#tropical perennial#summer flowers#perennials
  • Attributes:
    Genus:
    Canna
    Species:
    glauca
    Family:
    Cannaceae
    Uses (Ethnobotany):
    Its roots have been harvested to make an edible starch.
    Life Cycle:
    Bulb
    Perennial
    Recommended Propagation Strategy:
    Division
    Country Or Region Of Origin:
    South Carolina to tropical America
    Wildlife Value:
    Attracts butterflies and is a larval host for the Brazilian Skipper.
    Bulb Storage:
    Store in a dry medium such as peat or vermiculite in a cool dry location that does not get below 40 degrees F over the winter.
    Dimensions:
    Height: 2 ft. 0 in. - 6 ft. 0 in.
    Width: 2 ft. 0 in. - 3 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Perennial
    Water Plant
    Habit/Form:
    Clumping
    Erect
    Maintenance:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    High Organic Matter
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Alkaline (>8.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Occasionally Wet
    Usda Plant Hardiness Zone:
    7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11a, 11b
  • Fruit:
    Fruit Type:
    Capsule
  • Flowers:
    Flower Color:
    Gold/Yellow
    Orange
    Pink
    Red/Burgundy
    Flower Inflorescence:
    Spike
    Flower Value To Gardener:
    Showy
    Flower Bloom Time:
    Fall
    Summer
    Flower Description:
    Gladiolus-like flower spikes that bloom in late summer through early fall. Flower colors include red, salmon pink, yellow, and burnt orange.
  • Leaves:
    Leaf Color:
    Green
    Leaf Value To Gardener:
    Showy
    Leaf Shape:
    Lanceolate
    Hairs Present:
    No
    Leaf Description:
    Large, narrow, blue-green, paddle-shaped leaves that are very colorful and provide ornamental interest when not in flower. They clasp the center stem and resemble a banana plant.
  • Stem:
    Stem Color:
    Green
    Stem Is Aromatic:
    No
    Stem Description:
    Tall, erect stem supporting colorful flowers.
  • Landscape:
    Landscape Location:
    Pond
    Landscape Theme:
    Rain Garden
    Water Garden
    Attracts:
    Butterflies