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Centaurea Species, Black Knapweed

Centaureanigra subsp. rivularis

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Family

Asteraceae (ass-ter-AY-see-ee)

Info

Genus

Centaurea (sen-TAR-ee-uh)

Info

Synonym

Centaurea rivularis

Sun Exposure

Full Sun

Foliage

Herbaceous

Height

12-18 in. (30-45 cm)

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Spacing

Unknown - Tell us

Hardiness

USDA Zone 7a: to -17.7 °C (0 °F)

USDA Zone 7b: to -14.9 °C (5 °F)

USDA Zone 8a: to -12.2 °C (10 °F)

USDA Zone 8b: to -9.4 °C (15 °F)

USDA Zone 9a: to -6.6 °C (20 °F)

USDA Zone 9b: to -3.8 °C (25 °F)

USDA Zone 10a: to -1.1 °C (30 °F)

Danger

Unknown - Tell us

Bloom Color

Pink

Bloom Time

Mid Summer

Late Summer/Early Fall

Other Details

Gardener's Notes:

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positive

neutral

negative

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