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CANNA glauca

Image of Canna glauca

Forest & Kim Starr

Family

Cannaceae

Botanical Name

CANNA glauca

Plant Common Name

Maraca Amarilla, Water Canna

General Description

A large, upright tender perennial, Canna glauca is native to the tropical wetlands of the U.S. It is medium-tall and grows as a clump of long, pointed, upright blue-green leaves, unfurling from a rising stem eventually topped by clusters of tapered flower buds that open from spring into autumn to spidery yellow flowers. Prune stems to the highest leaf before the spent flowers make seeds to encourage the growth of new stems and prolong flowering.

Like other cannas, this one is grown as an annual in temperate zones. The rhizomes (fleshy underground stems) are dug in autumn and brought into a cool, dry garage or basement and then planted in spring after the last frost date. In warm to tropical climates, the rhizomes are hardy in the ground over winter and new leaves emerge in late spring. The rhizomes transplant and divide easily any time of year. They also spread on their own by branching, so one plant eventually becomes a cluster of many plants.

This species grows and flower best in full sun to partial sun and rich, moist to wet soil but also thrives in wet soils and even shallow standing water. It does not tolerate deep water. Use it at the margins of ponds and streams, or for summer color and tropical texture in wet beds and borders.

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    8 - 12

  • Sunset Zone

    H1, H2, 6, 7, 8, 9

  • Plant Type

    Bulb or Corm or Tuber

  • Sun Exposure

    Full Sun, Partial Sun

  • Bloom Time

    Indeterminate

  • Native To

    North America

Growing Conditions

  • Soil pH

    Acidic, Neutral

  • Soil Drainage

    Poorly Drained

  • Soil type

    Clay, Loam

  • Tolerances

    Wet Site, Soil Compaction

  • Growth Rate

    Very Fast

  • Water Requirements

    Average Water, Ample Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Light Yellow

  • Fruit Color

    Green, Brown, Chocolate

  • Foliage Color (Spring)

    Light Green

  • Foliage Color (Summer)

    Light Green

  • Foliage Color (Fall)

    Light Green, Burgundy

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Bold

  • Foliage Sheen

    Matte

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bog Garden, Container, Feature Plant, Mixed Border, Tropical, Water Gardens

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No