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PlantFiles: Bachelor's Button, Cornflower
Centaurea cyanus 'Black Ball'

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Centaurea (sen-TAR-ee-uh) (Info)
Species: cyanus (SY-an-us) (Info)
Cultivar: Black Ball

One vendor has this plant for sale.

18 members have or want this plant for trade.

Category:
Annuals

Height:
24-36 in. (60-90 cm)

Spacing:
6-9 in. (15-22 cm)

Hardiness:
Not Applicable

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
Dark Purple/Black

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous
Silver/Gray
Velvet/Fuzzy-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Flowers are good for drying and preserving

Soil pH requirements:
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

Click thumbnail
to view:

By LilyLover_UT
Thumbnail #1 of Centaurea cyanus by LilyLover_UT

By PurplePansies
Thumbnail #2 of Centaurea cyanus by PurplePansies

Profile:

1 positive
No neutrals
1 negative

Gardeners' Notes:

RatingAuthorContent
Negative hmoore On Jun 28, 2005, hmoore from Dallas, TX (Zone 8a) wrote:

I planted 24 Bachelor's Buttons in my garden about 3.5 weeks ago knowing it was a little late to plant them, but hoping to enjoy their color through August. I went out this morning to water my plants and birds had totally destroyed all of them. I feel like crying, but will learn from this experience to plant bird-resistant flowers next time. It's okay. I'll plant something prettier.

Positive LilyLover_UT On Jan 16, 2005, LilyLover_UT from Ogden, UT (Zone 5b) wrote:

This tall cornflower has very dark, reddish-purple (almost black) flowers with silvery-green foliage.

Regional...

This plant has been said to grow in the following regions:

Broomfield, Colorado
Middlefield, Connecticut
Barbourville, Kentucky
Foxboro, Massachusetts
, Washington
Kalama, Washington



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