| Scientific Name: | Centaurea cyanus |
| Common Name: | cornflower |
| Family Name: | Asteraceae |
| Origin: | Central / west Asia, Europe |
| Hardiness Zone: | Zone 3: (-40 to -34 °C) |
| Plant Type: | Annual (true), Invasive plant |
| Mature Size: | 0.7 - 1.3m x 0.3 - 0.6m (height x width) |
| Habit: | Spreading, Upright |
| Form: | Oval - horizontal |
| Texture: | Medium |
| Landscape Uses: | Attract birds, Attract butterflies, Bedding plant, Cut flower or foliage, Perennial border |
| Exposure: | Full sun, Part sun/part shade |
| Soil or Media: | Well-drained |
| Leaves: | Simple, Alternate, Soft flexible, Pinnate venation, Pubescent, Elliptic, Lanceolate, Ovate, Entire, Pinnately lobed |
| Flowers: | Head (capitulum), White, Blue, Purple, Pink, May-Jun |
| Fruit: | Achene, Brown, Oct-Nov |
| Key ID Features: | |
| Leaves sheathing, lanceolate, 10-15cm long x 2-4cm wide, entire or less commonly lobed; flower heads 3-4cm wide, commonly blue with purplish centres, whorls of bracts below with black margins, May-Jun. | |