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CORYDALIS curviflora 'Blue Heron'

Image of Corydalis curviflora var. rosthornii 'Blue Heron'

Terra Nova Nurseries, Inc.

Family

Fumariaceae

Botanical Name

CORYDALIS curviflora var. rosthornii 'Blue Heron'

Plant Common Name

Blue Heron Fumewort, Curveleaf Fumewort, Rosthorn's Curveleaf Fumewort

General Description

A beautiful but hard-to-please plant, this herbaceous perennial from high altitudes in northern Sichuan needs moderate summers to succeed. Growing from a cluster of fat storage roots, it bears conical sprays of 6 to 18 fragrant sapphire-blue flowers above clumps of ferny gray-green leaves. The calf-high flower stems debut in late spring and continue until fall if conditions remain moist and cool. The blooms have two outfacing lips and a broad upcurved spur. Plants go dormant and may perish in summer heat and drought. If happy, they spread to form large clumps. This perennial requires full sun to light shade and moist, well-drained, fertile, cool soil. Protect it from hot sun. It is an ideal candidate for a peat bed or similar sites in high-latitude or high-altitude gardens.

Characteristics

  • AHS Heat Zone

    5 - 1

  • USDA Hardiness Zone

    6 - 8

  • Sunset Zone

    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

    4"-10" / 10.2cm - 25.4cm

  • Width

    10"-15" / 25.4cm - 38.1cm

  • Bloom Time

    Late Spring, Early Summer, Summer, Late Summer, Early Fall, Fall

  • Native To

    China

Growing Conditions

  • Soil pH

    Acidic, Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Blue

  • Foliage Color (Spring)

    Gray Green

  • Foliage Color (Summer)

    Gray Green

  • Foliage Color (Fall)

    Gray Green

  • Fragrant Flowers

    Yes

  • 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

    Fine

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Mixed Border, Rock Garden / Wall

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No