Pollinator plant

Cornflower

Centaurea cyanus

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Common names

61 names · 38 languages
EnglishYour language
+7 more namesShow fewer names
Other languages (37)
Dutch
French
Afrikaans
  • bloukoringblom[4]
  • bloukoringblommetjie[4]
  • koringblom[4]
+1 more nameShow fewer names
  • koringblommetjie[4]
Arabic
  • قنطريون عنبري[4]
Belarusian
  • Валошка[4]
  • Васілёк сіні[4]
Bourbonnais
Bulgarian
  • Синя метличина[4]
Catalan
Chinese (Simplified)
+2 more namesShow fewer names
  • 蓝花矢车菊[4]
  • 车轮花[4]
Chinese (Traditional)
Croatian
  • Modra zečina[4]
  • Plavi različak[4]
Czech
  • chrpa modrá[4]
Danish
  • Kornblomst[4]
Estonian
Finnish
  • ruiskaunokki[4]
German
Hungarian
  • kék búzavirág[4]
Icelandic
  • Garðakornblóm[4]
Irish
Italian
Japanese
  • ヤグルマギク[4]
Korean
  • 수레국화[4]
Latvian
  • Zilā rudzupuķe[4]
Lithuanian
  • Paprastoji rugiagėlė[4]
Luxembourgish
Norwegian
Polish
  • Chaber bławatek[4]
Portuguese
Romanian
  • Albăstrea[4]
Russian
  • Василёк посевной[4]
  • Василёк синий[4]
Slovak
  • nevädza poľná[4]
Slovenian
Spanish
Swedish
Turkish
Ukrainian
  • Волошка синя[4]
Welsh
  • Glas yr ŷd[4]
Sources & name notes (6)

Names recorded in our plant catalogue and botanical sources, grouped by language. Usage can vary by region.

Catalogue language labels are reviewed separately from botanical source records.

Numbered references identify names recorded by an external source. Other names are from our plant catalogue.

[1] Centaurea cyanus — Plant Toolbox common names ↗

NC State Extension Gardener Plant Toolbox; English common names in a United States horticultural reference.

Source records
  • Bachelor's Button — ul#common_names > li:nth-of-type(1); heading: Common Name(s):; Centaurea cyanus.
  • Bachelors Buttons — ul#common_names > li:nth-of-type(2); heading: Common Name(s):; Centaurea cyanus.
  • Bluebottle — ul#common_names > li:nth-of-type(3); heading: Common Name(s):; Centaurea cyanus.
  • Cornflower — ul#common_names > li:nth-of-type(4); heading: Common Name(s):; Centaurea cyanus.
[2] Centaurea cyanus — iNaturalist taxon names ↗

Community-curated iNaturalist taxonomy. This is a common-name attestation, not an independent botanical determination.

Source records
  • bachelor's button — results[0].names[15]; taxon id 933404; Centaurea cyanus.
  • Kornblume — results[0].names[9]; taxon id 933404; Centaurea cyanus.
  • annual cornflower — results[0].names[19]; taxon id 933404; Centaurea cyanus.
  • Bachelor's-button — results[0].names[26]; taxon id 933404; Centaurea cyanus.
  • Batchelor's-Button — results[0].names[46]; taxon id 933404; Centaurea cyanus.
  • Blue bottle — results[0].names[18]; taxon id 933404; Centaurea cyanus.
  • Bluebottle — results[0].names[13]; taxon id 933404; Centaurea cyanus.
  • Corn Flower — results[0].names[47]; taxon id 933404; Centaurea cyanus.
  • Cornflower — results[0].names[10]; taxon id 933404; Centaurea cyanus.
  • Hurtsickle — results[0].names[14]; taxon id 933404; Centaurea cyanus.
  • aciano — results[0].names[56]; taxon id 933404; Centaurea cyanus.
  • Pincel — results[0].names[16]; taxon id 933404; Centaurea cyanus.
  • Bleuet — results[0].names[22]; taxon id 933404; Centaurea cyanus.
  • Bleuet des champs — results[0].names[23]; taxon id 933404; Centaurea cyanus.
  • centaurée bleuet — results[0].names[40]; taxon id 933404; Centaurea cyanus.
  • Fiordaliso vero — results[0].names[4]; taxon id 933404; Centaurea cyanus.
  • Korenbloem — results[0].names[27]; taxon id 933404; Centaurea cyanus.
  • Lóio-de-Jardim — results[0].names[30]; taxon id 933404; Centaurea cyanus.
[3] Catalogue of Life 2026-08-20 — Centaurea cyanus ↗

Common names from World Plants, version 26.05, reproduced in Catalogue of Life 2026-08-20. License: CC BY.

Source records
  • Bachelor's Button (EN) — VernacularName.tsv, line 140970; taxon 69GPL.
  • Echte Kornblume (DE); Cornflower — VernacularName.tsv, line 140971; taxon 69GPL.
[4] Centaurea cyanus — iNaturalist taxon names ↗

Community-curated iNaturalist taxonomy; common-name attestation, not an independent botanical determination.

Source records
  • bachelor's button — results[26].names[15]; taxon id 933404; Centaurea cyanus.
  • Kornblume — results[26].names[9]; taxon id 933404; Centaurea cyanus.
  • annual cornflower — results[26].names[19]; taxon id 933404; Centaurea cyanus.
  • Bachelor's-button — results[26].names[26]; taxon id 933404; Centaurea cyanus.
  • Batchelor's-Button — results[26].names[46]; taxon id 933404; Centaurea cyanus.
  • Blue bottle — results[26].names[18]; taxon id 933404; Centaurea cyanus.
  • Bluebottle — results[26].names[13]; taxon id 933404; Centaurea cyanus.
  • Corn Flower — results[26].names[47]; taxon id 933404; Centaurea cyanus.
  • Cornflower — results[26].names[10]; taxon id 933404; Centaurea cyanus.
  • Hurtsickle — results[26].names[14]; taxon id 933404; Centaurea cyanus.
  • aciano — results[26].names[56]; taxon id 933404; Centaurea cyanus.
  • Pincel — results[26].names[16]; taxon id 933404; Centaurea cyanus.
  • Bleuet — results[26].names[22]; taxon id 933404; Centaurea cyanus.
  • Bleuet des champs — results[26].names[23]; taxon id 933404; Centaurea cyanus.
  • centaurée bleuet — results[26].names[40]; taxon id 933404; Centaurea cyanus.
  • Fiordaliso vero — results[26].names[4]; taxon id 933404; Centaurea cyanus.
  • Korenbloem — results[26].names[27]; taxon id 933404; Centaurea cyanus.
  • Lóio-de-Jardim — results[26].names[30]; taxon id 933404; Centaurea cyanus.
  • Chaber bławatek — results[26].names[1]; taxon id 933404; Centaurea cyanus.
  • ruiskaunokki — results[26].names[2]; taxon id 933404; Centaurea cyanus.
  • Paprastoji rugiagėlė — results[26].names[3]; taxon id 933404; Centaurea cyanus.
  • Blåklint — results[26].names[5]; taxon id 933404; Centaurea cyanus.
  • rukkilill — results[26].names[6]; taxon id 933404; Centaurea cyanus.
  • Kornblomst — results[26].names[7]; taxon id 933404; Centaurea cyanus.
  • chrpa modrá — results[26].names[8]; taxon id 933404; Centaurea cyanus.
  • Васілёк сіні — results[26].names[11]; taxon id 933404; Centaurea cyanus.
  • Валошка — results[26].names[12]; taxon id 933404; Centaurea cyanus.
  • Василёк посевной — results[26].names[20]; taxon id 933404; Centaurea cyanus.
  • Василёк синий — results[26].names[21]; taxon id 933404; Centaurea cyanus.
  • Karblumm — results[26].names[24]; taxon id 933404; Centaurea cyanus.
  • kornblom — results[26].names[25]; taxon id 933404; Centaurea cyanus.
  • 수레국화 — results[26].names[28]; taxon id 933404; Centaurea cyanus.
  • ヤグルマギク — results[26].names[29]; taxon id 933404; Centaurea cyanus.
  • Garðakornblóm — results[26].names[31]; taxon id 933404; Centaurea cyanus.
  • 矢车菊 — results[26].names[32]; taxon id 933404; Centaurea cyanus.
  • 车轮花 — results[26].names[33]; taxon id 933404; Centaurea cyanus.
  • 蓝芙蓉 — results[26].names[34]; taxon id 933404; Centaurea cyanus.
  • 矢车草 — results[26].names[35]; taxon id 933404; Centaurea cyanus.
  • 矢車菊 — results[26].names[36]; taxon id 933404; Centaurea cyanus.
  • Blavet — results[26].names[37]; taxon id 933404; Centaurea cyanus.
  • Albăstrea — results[26].names[38]; taxon id 933404; Centaurea cyanus.
  • 蓝花矢车菊 — results[26].names[39]; taxon id 933404; Centaurea cyanus.
  • Волошка синя — results[26].names[41]; taxon id 933404; Centaurea cyanus.
  • bloukoringblom — results[26].names[42]; taxon id 933404; Centaurea cyanus.
  • bloukoringblommetjie — results[26].names[43]; taxon id 933404; Centaurea cyanus.
  • koringblom — results[26].names[44]; taxon id 933404; Centaurea cyanus.
  • koringblommetjie — results[26].names[45]; taxon id 933404; Centaurea cyanus.
  • Bibleu — results[26].names[48]; taxon id 933404; Centaurea cyanus.
  • Gökbaş — results[26].names[49]; taxon id 933404; Centaurea cyanus.
  • plavica — results[26].names[50]; taxon id 933404; Centaurea cyanus.
  • قنطريون عنبري — results[26].names[51]; taxon id 933404; Centaurea cyanus.
  • nevädza poľná — results[26].names[52]; taxon id 933404; Centaurea cyanus.
  • Zilā rudzupuķe — results[26].names[53]; taxon id 933404; Centaurea cyanus.
  • kék búzavirág — results[26].names[54]; taxon id 933404; Centaurea cyanus.
  • Gormán — results[26].names[55]; taxon id 933404; Centaurea cyanus.
  • Plavi različak — results[26].names[57]; taxon id 933404; Centaurea cyanus.
  • Modra zečina — results[26].names[58]; taxon id 933404; Centaurea cyanus.
  • Glas yr ŷd — results[26].names[59]; taxon id 933404; Centaurea cyanus.
  • Синя метличина — results[26].names[60]; taxon id 933404; Centaurea cyanus.
[5] Royal Horticultural Society — common names ↗

Names retained from the referenced botanical profile or table.

Source records
  • cornflower — Page 1, column 2, row top 697 pt; common-name cell after Centaurea cyanus.; Centaurea cyanus.
[6] Royal Horticultural Society — common names ↗

Names retained from the referenced botanical profile or table.

Source records
  • cornflower — Page 3, column 1, row top 262 pt; common-name cell after Centaurea cyanus.; Centaurea cyanus.
Plant references

Source-backed information

Published observations for this plant. Each reference supports the information beside it.

Taxonomy
Centaurea cyanus is an accepted species in Catalogue of Life.

Taxonomic treatment in the August 2026 release; the catalogue record name is preserved.

Sources [1]
Botanical family
Asteraceae

Family in the cited taxonomic treatment.

Sources [1]
Mature height
0.3–0.91 m

NC State Extension profile. Converted from the source range in feet and inches; mature size varies with growing conditions.

Sources [2]
Mature spread
0.3–0.61 m

NC State Extension profile. Converted from the source range in feet and inches; mature size varies with growing conditions.

Sources [2]
Plant habit
Erect

NC State Extension profile.

Sources [2]
Life cycle
Annual

NC State Extension profile.

Sources [2]
Growth rate
Medium

NC State Extension profile.

Sources [2]
Light
Full sun (6 or more hours of direct sunlight a day); Partial Shade (Direct sunlight only part of the day, 2-6 hours)

NC State Extension profile.

Sources [2]
Moisture and drainage
Good Drainage; Moist

NC State Extension profile.

Sources [2]
Soil texture
Clay; High Organic Matter; Loam (Silt)

NC State Extension profile.

Sources [2]
Soil pH
Acid (<6.0); Alkaline (>8.0); Neutral (6.0-8.0)

NC State Extension profile. These source categories do not certify the catalogue’s numeric pH interval.

Sources [2]
Flowering season
Summer

NC State Extension profile. Seasons reflect the source region and do not verify the catalogue’s exact flowering months.

Sources [2]
Native range
Western Asia, Europe

NC State Extension profile. Origin reported by the source; this is not a claim of local nativeness.

Sources [2]
Reported wildlife attraction
Listed as attracting: butterflies, pollinators.

NC State Extension profile. Broad wildlife categories; this does not establish flower visits by a named bee species or quantify nectar and pollen.

Sources [2]
Pollinator guidance
RHS includes Centaurea cyanus in its Plants for Pollinators guidance.

RHS planting guidance. Choose accessible flowers with pollen and nectar; reduced-resource and double-flowered forms may be unsuitable.

Sources [3] [4]
Catalogue ratings

Who this plant supports

Honey bees

High suitability
Nectar value High
Pollen value High
Plant profile

About this plant

Bachelor's Button (Centaurea cyanus) is a herbaceous plant. It flowers from June to August.

Sources and references

References for the information marked with source numbers on this page.

Sources checked
  1. Catalogue of Life Centaurea cyanus — Catalogue of Life COL26.8

    COL26.8 (2026-08-20). Contributing checklist: Synonymic Checklists of the Vascular Plants of the World. This is taxonomic evidence, not an independent ecological study.

    Supports: TaxonomyBotanical family
    Relevant sections
    • Taxonomy: NameUsage.tsv line 2017708; ID 69GPL; rank species; status accepted
    • Botanical family: NameUsage.tsv line 2017708; ID 69GPL; rank species; status accepted

    Source checked on .

    Source data licence: CC BY 4.0.

  2. NC State Extension Centaurea cyanus — Plant Toolbox

    NC State Extension Gardener Plant Toolbox. Growing conditions and seasons reflect its United States horticultural context.

    Supports: Mature heightMature spreadPlant habitLife cycleGrowth rateLightMoisture and drainageSoil textureSoil pHFlowering seasonNative rangeReported wildlife attraction
    Relevant sections
    • Mature height: Dimensions / Height
    • Mature spread: Dimensions / Width
    • Plant habit: Habit/Form
    • Life cycle: Life Cycle
    • Growth rate: Growth Rate
    • Light: Light
    • Moisture and drainage: Soil Drainage
    • Soil texture: Soil Texture
    • Soil pH: Soil pH
    • Flowering season: Flower Bloom Time
    • Native range: Country Or Region Of Origin
    • Reported wildlife attraction: Attracts

    Source checked on .

  3. Royal Horticultural Society RHS Plants for Pollinators — Wildflowers

    RHS planting guidance; applicable flower-form restrictions are retained. General recommendations do not measure local nectar or pollen production.

    Supports: Pollinator guidance
    Relevant sections
    • Pollinator guidance: Page 3, column 1, entry Centaurea cyanus (top 262 pt)

    Source checked on .

  4. Royal Horticultural Society RHS Plants for Pollinators — Plants Of The World

    RHS planting guidance; applicable flower-form restrictions are retained. General recommendations do not measure local nectar or pollen production.

    Supports: Pollinator guidance
    Relevant sections
    • Pollinator guidance: Page 1, column 2, entry Centaurea cyanus (top 697 pt)

    Source checked on .