Cornflower (Centaurea cyanus): colours, meaning, where it grows and when it blooms

Cornflower is an annual plant with vivid blue flowers, native to temperate Europe but now found worldwide. Once a familiar weed in grain fields, it is grown for gardens, cut flowers, and edible petals, and is valued by bees and birds.

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Cornflower's vivid blue comes from the pigment protocyanin.
It is endangered in its native European fields due to herbicides.
Petals are edible and used in teas and food decoration.
Bees and goldfinches are attracted to its nectar and seeds.
It is a national symbol in Germany and Austria.

What does Cornflower look like?

Cornflower is an upright annual that grows 20 to 100 cm tall, with slender, branched grey-green stems and narrow, lance-shaped leaves. Its flowerheads are usually a striking deep blue, about 1.5 to 3 cm across, with a ring of larger, spreading petals around a cluster of smaller ones. Other cultivated forms can be pink, purple, white, or very dark maroon. The plant produces small fruits with bristles. Cornflower blooms through summer.

Where does Cornflower come from?

Cornflower is native to temperate Europe, where it once grew widely as a weed in cereal fields. Its name comes from its habit of appearing among crops like wheat and barley. The plant has been present in Britain and Ireland since ancient times, but has become rare in its original range due to modern farming and herbicide use. It is now naturalized in many regions, including North America, Australia, and China, often introduced as a garden flower or through contaminated seed.

When and how Cornflower blooms

Cornflower grows best in full sun and well-drained, neutral to mildly alkaline soil. It is sown in late spring for summer blooms, or in early autumn in milder climates for earlier flowering. Plants are spaced about 20–30 cm apart. Deadheading encourages more blooms. Several cultivars exist, with a range of pastel shades. Seeds can be collected by hand or with machines in larger settings.

How Cornflower is used

People grow cornflower for its bright flowers in gardens and as cut flowers for bouquets. The petals are edible and used to decorate salads, desserts, cheeses, and teas, including Lady Grey tea. Dried petals add color to foods and drinks. The plant is also used in herbal medicine, especially for minor eye inflammations. Bees and other insects are attracted to its nectar, and birds such as goldfinches eat its seeds.

Kinds of Cornflower

Gardeners have bred cornflower into many forms, including double-flowered blue types like 'Blue Boy', as well as pink, lavender, white, and nearly black varieties. Wild forms are usually blue. No accepted subspecies exist, but there are many synonyms and some regional names.

What Cornflower means

Cornflower is a symbol of Germany and was linked to Prussian royalty. It has appeared in folklore as a token of love and was worn by young men. In Austria, it has been used as a political symbol. The flower's intense blue inspired the German Romantic 'Blue Flower' motif. Conservation groups now work to protect it in its original European habitats, where it is endangered.

Where Cornflower is used and seen

BoutonnièreA single flower worn on a suit or tuxedo lapel for formal occasions

Traditions that use it

Vinok and midsummer crowns Boutonnière and corsage Infiorata The remembrance poppy

Where to see Cornflower

🇮🇹 Castelluccio di Norcia · May to JulThe flowering of the Castelluccio plainA high plain in the Sibillini mountains where lentil fields and their wild flowers colour the ground in bands from late May.

Questions people ask about Cornflower

Where does cornflower come from?

Cornflower is native to temperate Europe, where it once grew widely as a weed in grain fields. It is now also found in North America, Australia, China, and other regions as a naturalized or garden plant.

What does cornflower look like?

Cornflower is an upright annual plant with slender, branched stems and narrow leaves. Its flowerheads are usually bright blue, about 1.5 to 3 cm across, but garden varieties can also be pink, purple, white, or maroon.

Is cornflower edible?

Yes, the petals of cornflower can be eaten raw, dried, or cooked. They are often used to add color to salads, desserts, cheeses, and teas.

What does cornflower symbolize?

Cornflower has been a symbol of Germany and Prussian royalty. In folklore, it was worn by young men in love, and it appears in literature as a symbol of romantic longing.

Why is cornflower endangered in Europe?

Cornflower has declined in its native European fields mainly because of intensive agriculture and heavy herbicide use, which have reduced its habitat.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Centaurea cyanus", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

Chrysanthemum: Muhammad Mahdi Karim, GFDL 1.2, source

Common sunflower: Jon Sullivan, Public domain, source

Almond: Ivar Leidus, CC BY-SA 4.0, source

Dandelion: Greg Hume, CC BY-SA 3.0, source

Cornflower: TeunSpaans, CC BY-SA 3.0, source

Tulip: John O'Neill, CC BY-SA 3.0, source

Linden: Bruce Marlin, CC BY 3.0, source

Blackthorn: Unknown author, CC BY-SA 3.0, source

Asteraceae: TeunSpaans, CC BY-SA 3.0, source

Boutonnière: David Ring, CC0, source

Castelluccio Di Norcia Fioritura: No machine-readable author provided. Lukkio84~commonswiki assumed (bas, Public domain, source

Cornflower