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| Identification |
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Genus
Centaurea
Species
cyanus
Variety
Cultivar
Common names
cornflower
bachelor's button
Family
ASTERACEAE
Specimen number
S11708
Data source
HtZn p92;MedPl p183;Frgnt p90;Xeri p277
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| Life cycle |
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Life form
Terrestrial
Life cycle
Annual
Life span
1 year
Annual cycle
Not applicable
Stature
Various
Growth form
Not applicable
Growth habit
Various
Overall height
1' 8"
Overall spread
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| Climate |
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Sunshine
Various
Water
Moist
Optimal soil texture
Loam
Acceptable soil pH
Neutral
USDA hardiness
USDA zones 03a-09b
AHS heat zones
Heat zones 09-01
Sunset climate zones
Not classified
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| Garden |
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Suitable for gardens
yes
Nursery
Unknown
Compost
no
Size at acquisition
Unknown
Garden location
Unknown
Garden notes
The flowers of Centaurea cyanus have a faintly sweet aroma. Bachelor's button (also known as cornflower) can survive very cold winters with annual averages as low as -40� Fahrenheit. This plant needs summer days with high heat. This species does well in loamy soils. It needs soil that is moist.
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| Special qualities |
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Tolerates drought
no
Tolerates high humidity
no
Tolerates seaside conditions
no
Insect resistant
no
Disease resistant
no
Deer resistant
no
Best uses
Symbiosis
Attracts butterflies
no
Attracts hummingbirds
no
Autumn foliage
no
Colorful berries
no
Desirable qualities
Other interest
Other interest color
Other interest period
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| Adverse factors |
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Common pests
Poisonous parts
Poisonous indications
Internal poison
no
Dermatologic poison
no
Livestock poison
no
Mechanical injury
no
Hay fever pollen
Hay fever season
Adverse qualities
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| Herbal medicine |
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Medicinal properties
bitter
stimulant
laxative
antirheumatic
Medicinal parts
Flowers
Seeds
Leaves
Has medicinal uses
yes
Do not self-administer
no
Do no use if pregnant
no
Legally restricted
no
Toxicity precautions
Medicinal notes
Centaurea cyanus has traditionally been used in many herbal remedies including: as a bitter, as a stimulant, as a laxative and as an antirheumatic. (More are listed in the medicinal properties section.) The flowers as well as the seeds and the leaves are used in herbal preparations.
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| Traditional uses |
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Parts used
Traditional uses
Contemporary uses
Fragrance
mild scent only noticeable up close
Fragrance parts
Flowers
Fragrance intensity
Faint
Fragrance category
Faintly sweet
Dye parts
Dye color
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| Cultivation |
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Propagule
Seed
Pollination method
Planting style
Crop spacing
Row spacing
Cold frame
Planting period
Harvesting period
Frost tolerance
Heat requirement
Cool
Fertilizer
Typical
Time to harvest
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| Nutrition |
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Is edible
no
Culinary uses
Nutritional value
Edible parts
Description of edible parts
Flavor / texture
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| Horticulture |
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Horticulture notes
It does not necessarily require warm days for good production. Centaurea cyanus is typically propagated by seed.
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| Herbarium |
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Tag needs printing
no
Collection notes
Centaurea cyanus has an annual life cycle. Blossoms in such colors as pink, blue, violet, purple and white are common.
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Page 989 of 4998
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