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Iris x hollandica

Image of Iris x hollandica

International Flower Bulb Centre

Family

Iridaceae

Botanical Name

Iris x hollandica

Plant Common Name

Dutch Iris

General Description

Named for the Holland growers who originally hybridized them, the bright flowers of Dutch iris arise on slender stems in spring amid narrow, reedlike foliage. The sturdy, graceful blossoms are comprised of three upright standards and three downward-curving falls, which are usually marked with a bright yellow blotch. Appearing in numerous shades and combinations of blue, purple, yellow, white, bronze, mauve and orange, these colorful iris make excellent, long-lasting cut flowers.

Dutch iris are sun-loving, bulbous perennials which go dormant after flowering in spring. Plant the bulbs in late summer to early fall at a depth of three to four inches, spaced three to six inches apart, in moderately fertile, well-drained soil. The vibrant blooms Dutch iris are best displayed among other perennials, whose foliage conceals the plants as they go dormant.

Characteristics

  • AHS Heat Zone

    9 - 5

  • USDA Hardiness Zone

    5 - 9

  • Sunset Zone

    2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Bulb or Corm or Tuber

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    18"-24" / 45.7cm - 61.0cm

  • Width

    3"-6" / 7.6cm - 15.2cm

  • Bloom Time

    Spring

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Clay, Loam, Sand

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Spring

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    White, Yellow, Blue, Purple, Orange, Gold, Lavender, Blue Violet, Bronze

  • Foliage Color (Spring)

    Green

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Cutflower, Mixed Border

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No