General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Dry
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 8b
Plant Height: 1 to 3 feet
Fruit: Edible to birds
Fruiting Time: Late summer or early fall
Flowers: Showy
Flower Color: Pink
Purple
Flower Time: Summer
Late summer or early fall
Underground structures: Rhizome
Uses: Medicinal Herb
Will Naturalize
Wildlife Attractant: Bees
Birds
Butterflies
Resistances: Drought tolerant
Propagation: Seeds: Self fertile
Propagation: Other methods: Division
Pollinators: Self
Moths and Butterflies
Flies
Bees
Miscellaneous: Tolerates poor soil

Image
Common names
  • Lesser Knapweed
  • Black Knapweed
  • Hardheads
  • Spanish Buttons

Photo Gallery
Location: Hohe Tauern - Austria
Location: Hohe Tauern - Austria
Date: 2018-07-22
Location: Fieldstone Gardens, Vassalboro, Maine, USA
Date: 2020-06-28
Centaurea nigra (#CEN575)

credit: Mikrolit

Photo by Leo Michels

Photo by Leo Michels

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