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AGAPANTHUS 'Blue Danube'

Image of Agapanthus 'Blue Danube' ('Donau')

International Flower Bulb Centre

Family

Liliaceae

Botanical Name

AGAPANTHUS 'Blue Danube' ('Donau')

Plant Common Name

African Lily, Blue Danube Lily-of-the-Nile, Lily-of-the-Nile

General Description

The vigorous lily-of-the-Nile, 'Blue Danube', bears large rounded clusters of light violet-blue flowers on very tall stems. Often listed as a variant of the South African Agapanthus africanus, it is actually a hybrid. Where hardy, it is best grown in the landscape but in colder climates it may be maintained as a container specimen if provided a large spacious pot. Flowering is most profuse from late-spring through summer.

The long strap-like leaves of this tender perennial are medium green and produced in substantial clumps. Though technically evergreen, the foliage may die back until spring if plants are subjected to hard, but not killing, frost. Attractive rounded clusters of small, lily-like flowers are produced throughout the growing season. Each small six-petaled bloom is trumpet-shaped. Bees pollinate the flowers and small seed capsules that turn from green to brown follow. Cut spent stems back to keep plants looking tidy and encourage further bloom.

Provide lily-of-the-Nile full to partial sun and soil that is fertile, well-drained and has a neutral pH. Water regularly during the summer months for best flowering, but keep plants drier through the winter months. Established plants will withstand substantial periods of drought. Specimens grown in containers or small garden spaces should be divided regularly as clumps tend to spread vigorously.

Lily-of-the-Nile is best planted as a groundcover, border specimen or container plant. It is quite carefree; pest and disease problems are few and deer do not feed on it.

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    7 - 11

  • Sunset Zone

    H1, H2, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Perennial

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    3'-4' / 0.9m - 1.2m

  • Width

    2'-3' / 0.6m - 0.9m

  • Bloom Time

    Early Spring, Spring, Late Spring, Early Summer, Summer, Late Summer, Early Fall, Late Winter, Indeterminate

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Acidic, Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Clay, Loam, Sand

  • Growth Rate

    Fast

  • Water Requirements

    Drought Tolerant, Average Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Sky Blue, Blue Violet

  • Foliage Color (Spring)

    Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Green

  • Foliage Color (Winter)

    Green

  • 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

    Medium

  • Foliage Sheen

    Glossy

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bedding Plant, Container, Edging, Groundcover, Mixed Border, Rock Garden / Wall

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No