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DELPHINIUM 'Casa Blanca'

Image of Delphinium 'Casa Blanca'

Family

Ranunculaceae

Botanical Name

DELPHINIUM 'Casa Blanca'

Plant Common Name

Casa Blanca Delphinium, Delphinium, Larkspur

General Description

Tall, airy spires of white flowers in summertime make delphinium ‘Casa Blanca’ a graceful accent for the summer perennial garden. Its spurred, five-petaled blossoms are borne on slender, branched stems from early to midsummer. Somewhat resembling “elf caps” in appearance, the snowy blooms are also attractive to bees and butterflies. They rise from basal clumps of lush green, deeply lobed foliage which has an almost feathery appearance.

Grow delphiniums in full sun and fertile, well-drained soil which receives regular moisture. Slightly alkaline soils are ideal. The tall flowering stems may require staking to prevent toppling, and windy sites should be avoided. After the flowers fade, promptly cut back the stems to any lower flowering side shoots to encourage extended blooming. The plants may produce a second full show of flowers by mid-autumn. Monitor closely for slugs and snails in spring, as these can damage new growth.

The beautiful colors and striking vertical habit of delphiniums add drama to mixed beds and borders. Their gorgeous blooms also make outstanding cut flowers. Often short-lived, these perennials are frequently treated as annuals or biennials, particularly in areas with long, hot summers.

Characteristics

  • AHS Heat Zone

    8 - 1

  • USDA Hardiness Zone

    3 - 7

  • Sunset Zone

    A1, A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Perennial

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    3'-5' / 0.9m - 1.5m

  • Width

    12"-18" / 30.5cm - 45.7cm

  • Bloom Time

    Early Summer, Summer, Early Fall

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    White

  • Foliage Color (Spring)

    Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    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

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bedding Plant, Cutflower, Mixed Border

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    No