PlantsCentaurea→Bachelor's Buttons (Centaurea cyanus)

Common names:
Give a thumbs up Cornflower
Give a thumbs up Bachelor's Buttons

Botanical names:
Centaurea cyanus Accepted
Cyanus segetum Synonym

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Plant Height: 1-3 feet
Plant Spread: 1-2 feet
Leaves: Unusual foliage color
Other: Lyrate-pinnatifid lower leaves and narrow lanceolate upper leaves.
Flowers: Showy
Flower Color: Blue
Other: Purple-blue flowers (sometimes pink to white)
Flower Time: Late spring or early summer
Uses: Cut Flower
Dried Flower
Will Naturalize
Edible Parts: Flowers
Eating Methods: Raw
Wildlife Attractant: Bees
Resistances: Drought tolerant
Propagation: Seeds: Self fertile
Provide darkness
Pollinators: Self
Moths and Butterflies
Miscellaneous: Tolerates poor soil
Awards and Recognitions: Other: National Flower of Estonia; Provincial Flower of Östergötland, Sweden

#pollination Yellow Swallow Tail

Honey Bees in the Garden:  JuneHoney Bees in the Garden: June
By Mindy03 on June 1, 2011

June brings the end of school, Father's Day and summer. Summer brings hot weather and plants may need extra water. Honey bees will also need extra water to keep the hive cool.

(Full article7 comments)
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Posted by Sharon (Calvert City, KY - Zone 7a) on Dec 3, 2011 10:42 PM

The cornflower, Bachelor's Button, is a native of Europe and widely cultivated in North America, so much so that it has escaped from gardens and naturalized. It is an annual herb, with an erect wiry stem that branches and can grow to about 2 feet tall. At the ends of the branches grow single brilliant blue flowerheads. It has long grayish green leaves that are lance shaped and downy like the stem.

At one time it was considered a medicinal plant, and it does have the qualities of an astringent.

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Posted by Mindy03 (Delta KY) on May 3, 2012 6:48 PM

Valuable source of nectar and pollen for honey bees.

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Plant Events from our members
flaflwrgrl On May 22, 2014 Bloomed
flaflwrgrl On January 1, 2014 Seeds sown
From wildflower seed.
chelle On January 19, 2015 Seeds sown
Classic Fantastic w/s - sealed - cob and verm
Classic Magic w/s - sealed - cob and verm
piksihk On December 11, 2020 Seeds sown
Sow front side
piksihk On March 5, 2020 Bloomed
These selfsowed along with red poppies
piksihk On January 3, 2019 Seeds sown
HW frt
piksihk On May 3, 2018 Bloomed
Been blooming nicely so blue;
Front and back beds
piksihk On May 14, 2017 Bloomed
wildflower packet; front bed HW
lovesblooms On February 8, 2017 Seeds germinated
double mixed colors
lovesblooms On January 15, 2017 Seeds sown
w/s; double mixed colors
lovesblooms On March 13, 2015 Seeds germinated
lovesblooms On January 29, 2015 Seeds sown
winter sown light purple, white with pink center
MrsBinWY On April 2, 2019 Seeds germinated
1; 11 on 4-3-19
MrsBinWY On March 31, 2019 Seeds sown
16 seeds in milk jug @ room temp - germination test of seeds donated to the Seed Library
gochna On June 18, 2020 Obtained plant
transplanted approx. 13 plants into the Marguerite meadow section. Will watch if the plants renew themselves in 2021
gochna On November 13, 2019 Seeds sown
bulk purchased from the seed supplier in late summer 2019
some seeds collected in summer
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Gotta Be by webesemps May 30, 2014 3:22 PM 1
misidentification by zuzu Oct 15, 2019 11:49 AM 11
Annual seed mixture identification help! by funguslulu Jun 30, 2020 5:23 PM 2
Planted wildflower seeds and this particular plant is dominating. What is it? by Flowerguy0410 May 21, 2020 8:28 PM 3
Plant Trivia by JHeirloomSeeds Apr 12, 2019 8:08 AM 401
Can someone pls help I'd this by Pleinhauser Aug 25, 2018 6:13 AM 4
Annuals 2017 by islander Oct 26, 2017 2:26 PM 41
One more ID please by IJsbrandtGA May 2, 2017 1:58 PM 1
Aubergine/ eggplant? by t_bar May 3, 2017 4:56 PM 6
2017 "Think Spring!!" Seed Swap CHAT by critterologist Feb 12, 2017 7:30 AM 73
Goodwill find (dried flower art) by Jai_Ganesha Jan 4, 2017 10:16 PM 18
What to sow in March by alkavijh Feb 8, 2016 1:29 PM 7

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