Species Centaurea cyanus (Cornflower, Bachelor's Button, Bluebottle)

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Names

Scientific name: Centaurea cyanus
Common name: Cornflower, Bachelor's Button, Bluebottle

Measurements

Height: 12 - 36 in
Spread: 12 - 24 in
Spacing: 6 in
Growth Rate: Moderate

Requirements

Hardiness zones: 2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11a, 11b
Sunlight: Full Sun, Partial Shade
Soil Drainage: Well Drained
Soil type: Loam, Sand
Soil pH: Slightly acidic (6.1 - 6.5), Neutral (6.6 - 7.3), Slightly alkaline (7.4 - 7.8)

Physical Traits

Lifecycle: Annual
Leaf lifecycle: Deciduous
Foliage color: Medium Green
Bloom time: Summer
Bloom color: Blue, Pink, White
Seasons of interest: Summer
Propagation methods: Seeds
Attracts: Birds, Butterflies

Taxonomy

Taxonomic Rank: Species
Author: L.
Publication: Sp. Pl. : 911 (1753)

Superior Taxa

Kingdom: Plantae
Subkingdom: Pteridobiotina
Phylum: Angiosperms
Order: Asterales
Family: Asteraceae
Subfamily: Carduoideae
Tribe: Cardueae
Subtribe: Centaureinae
Genus: Centaurea

Synonyms

Cyanus vulgaris Centaurea pulcherrima Cyanus dentato-folius Centaurea cyanus var. cyanus Jacea segetum Cyanus segetum Centaurea umbrosa Leucacantha cyanus Centaurea cyaneum Centaurea cyanus var. denudata Centaurea cyanus subsp. coa Centaurea rhizocephala Cyanus cyanus Centaurea concinna Centaurea lanata Centaurea cyanus subsp. cyanus Centaurea cyanocephala Centaurea segetalis Centaurea concinna Cyanus arvensis Centaurea pulchra

References

Centaurea cyanus - Plant Finder, Missouri Botanical Garden, https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=277177, accessed November 10, 2024

Centaurea cyanus (Bachelor's Button, Bachelors Buttons, Bluebottle, Cornflower) | North Carolina Extension Gardener Plant Toolbox, NC State Extension, https://plants.ces.ncsu.edu/plants/centaurea-cyanus/, accessed November 10, 2024

Centaurea cyanus (Cornflower), Gardenia, https://www.gardenia.net/plant/centaurea-cyanus-cornflower, accessed November 10, 2024

Cornflower | Description & Facts | Britannica, Britannica, https://www.britannica.com/plant/bachelors-button, accessed November 10, 2024

Centaurea cyanus (Cornflower): Minnesota Wildflowers, Minnesota Wildflowers, https://www.minnesotawildflowers.info/flower/cornflower, accessed November 10, 2024

Centaurea cyanus Cornflower, Garden cornflower, Blue Bottle, Cornflower PFAF Plant Database, Plants for a Future, https://pfaf.org/user/Plant.aspx?LatinName=Centaurea+cyanus, accessed November 10, 2024

World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024