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    • Photo of Centaurea cyanus flower by Dalgial

    Photo by Dalgial

    This file is licensed under the Creative Commons Attribution-Share Alike 3.0 license.

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    Centaurea cyanus

    Also Known As

    • Cyanus segetum
    • Bachelor Button
    • Cornflower

    Plant type

    annual / biennial

    size

    • H: 2'
    • W: 2'

    planting zones

    • 1-12

    Centaurea cyanus plant details

    Centaurea cyanus is a broadleaf deciduous annual / biennial with blue and green foliage. In spring and summer blue flowers emerge. Features fuzzy texture. Attracts bees making it an excellent addition to pollinator gardens. Grows well with sun and regular - low water. Does well in average and well-drained soil. A good option if you're seeking something heat tolerant.

    CHARACTERISTICS OF Centaurea cyanus

    Plant type: annual / biennial
    Plant family: asteraceae
    Foliage: deciduous blue and green
    Mature size: 2 FT wide, 2 FT tall
    Flowers: blue blooms in spring and summer
    Uses: border plant, cottage garden, cutting garden, easy-to-grow, edible, heirloom, medicinal, self-sowing

    GROWING CONDITIONS for Centaurea cyanus

    USDA Zones: 1 - 12
    Sun exposure: sun
    Watering frequency: regular - low
    Resistant to: deer, heat
    Soil needs: average and well-drained

    Nursery contributed plant descriptions

    Add a sprinkle of brilliant blue and a sweet spicy flavor to salads and quick breads. Historic use as a remedy for weak eyes.""

    By: Select Seeds

    Gardening facts about Centaurea cyanus plant

    How to Grow Centaurea cyanus

    • Sun Exposure

      • sun

    • Water Needs

      • regular - low

    • Soil Needs

      • average
      • well-drained

    • Special Situation

      • heat tolerant

    Features

    • Foliage Color

      • green
      • blue

    • Flower Color

      • blue

    • Wildlife

      • bees
      • deer resistant

    • Flower Season

      • summer
      • spring

    • Foliage Season

      • deciduous

    • Texture

      • fuzzy

    See other plant types of Centaurea for your garden

    Centaurea orientalis

    aka Cornflower

    Plant Type

    Perennial

    Zones

    6a-10b

    Size

    Height: 24"

    Width: 12"

    • sun
    • occasional - drought tolerant
    Photo of Centaurea orientalis flower by Dancing Oaks Nursery
    View Plant

    Centaurea cyanus 'Black Gem'

    aka Cyanus segetum 'Black Gem', Black Gem Bachelor's Buttons

    Plant Type

    Annual / Biennial

    Zones

    1-11

    Size

    Height: 12"-24"

    Width: 6"-12"

    • sun
    • regular - drought tolerant
    • dry in summer
    Photo of Centaurea cyanus 'Black Gem' flower, form by Annie's Annuals & Perennials
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    Centaurea cyanus 'Blue Diadem'

    aka Cyanus segetum 'Blue Diadem', Blue Diadem Bachelor's Buttons

    Plant Type

    Annual / Biennial

    Zones

    1-11

    Size

    Height: 24"-36"

    Width: 12"-30"

    • sun - mostly sun
    • occasional - drought tolerant
    • dry in summer
    Photo of Centaurea cyanus 'Blue Diadem' flower by Annie's Annuals & Perennials
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    Centaurea scabiosa

    aka Centaurea scabiosa 'Perennial Butterfly', Greater Knapweed, Perennial Bachelor Button, Perennial Butterfly Cornflower

    Plant Type

    Perennial

    Zones

    3a-10b

    Size

    Height: 2'

    Width: 3'

    • sun - mostly sun
    • regular - occasional
    Photo of Centaurea scabiosa flower by Annie's Annuals & Perennials
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    Centaurea cineraria

    aka Centaurea candidissima, Centaurea gymnocarpa, Dusty Miller, Velvet Centaurea, Velvet Centaurea

    Plant Type

    Shrub, Perennial

    Zones

    7a-10b

    Size

    Height: 3'-4'

    Width: 8'

    • sun - mostly sun
    • regular - drought tolerant
    • dry in summer
    Photo of Centaurea cineraria flower, foliage by Annie's Annuals & Perennials
    View Plant

    More Options

    +38 more Centaurea
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