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Bachelor’s Buttons

Species
Centaurea cyanus

Bachelor’s buttons was introduced to North America from Europe (where it is also known as “cornflower”), where this annual species is native and a common weed in grain (“corn”) fields. It is often sold as a popular ornamental plant and seeds are sold in wildflower and bird seed mixtures. Bachelor’s buttons has striking sky-blue (sometimes purple, pink or white) pompom flowers atop 30- to 90-cm-tall, grey-green stems with slender leaves of the same colour.

How does it spread?
Bachelor’s buttons spreads by seed. Seeds are spread by humans, wind, water and wildlife including birds that may eat and disperse the seeds. The seeds are also a contaminant in crop seeds and spread in the agriculture industry. The plant, with its beautiful flower color, is sought after by gardeners but unfortunately, the plant has escaped cultivation. 

Where would I find it?
Bachelor’s buttons is often found along river banks, the edges of bluffs, railroads and roadsides, empty lots, meadows and in fallow fields and open, disturbed areas. 

What problems does it cause?
Seedlings grow quickly, produce copious seed and readily invade dry meadows, grasslands and cultivated grain fields.

Additional Recommendations

  • Painted Daisy (Tanacetum coccineum) (z3)

A provincial initiative coordinated by ISCBC

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