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

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

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

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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Gardeners' Notes:

1
positive
0
neutrals
1
negative
RatingContent
Negative

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

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.