General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 7b -15 °C (5 °F) to -12.2 °C (10 °F)
Maximum recommended zone: Zone 9b
Plant Height: 3 to 4 inches
Plant Spread: 12 to 18 inches
Flowers: Showy
Flower Color: Blue
Bloom Size: 1"-2"
Flower Time: Summer
Late summer or early fall
Uses: Groundcover
Cut Flower
Propagation: Seeds: Needs specific temperature: 68ºF - 70ºF
Days to germinate: 7 to 14 days
Depth to plant seed: Shallowly sow, covering with a thin layer of soil.
Containers: Suitable for hanging baskets
Needs excellent drainage in pots

Common names
  • Cornflower
  • Bachelor Button
  • Knapweed
Botanical names
  • Accepted: Centaurea cyanoides
  • Synonym: Cyanus cyanoides

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