Photo by Dalgial
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 license.
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
By: Select Seeds
Garden photo gallery of Centaurea cyanus
By: Dalgial
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 license.
View Original PhotoGardening 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
Landscape groups by tags
See other plant types of Centaurea for your garden
aka Caramia Perennial Cornflower
Plant Type
Perennial
Zones
3a-9b
Size
Height: 1'-2'
Width: 1'-2'
- sun - dappled shade
- regular - drought tolerant
aka Cornflower
Plant Type
Perennial
Zones
6a-10b
Size
Height: 24"
Width: 12"
- sun
- occasional - drought tolerant
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
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
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
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