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How to Care for a Cornflower

Updated March 23, 2017

The cornflower (Centaurea ), or bachelor's button as it is sometimes known, is an old-fashioned flowering annual, beloved for its small, blue flowers. Cornflowers are attractive in both fresh and dried cut flower arrangements and add a colour not often found in the garden. Cornflowers bloom in spring and summer and are relatively care free.

Grow the cornflower in a full-sun location in the garden, unless you are in a particularly hot area of U.S. Department of Agriculture Hardiness zones 8 through 10. In that case, provide the cornflower with afternoon shade.

Water the cornflower to a depth of 6 inches and then allow the soil to dry before watering again.

Fertilise the cornflower with 10-10-10 fertiliser, at the rate suggested on the label, once a month while it is flowering. Apply the fertiliser to the soil around the plant and water it in to a depth of 6 inches.

Deadhead the cornflower periodically throughout the growing season. To do this, snap off the flower head with your fingers or pruning shears.

Things You'll Need

  • Fertiliser
  • Pruning shears
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About the Author

Based in the American Southwest, Bridget Kelly has been writing about gardening and real estate since 2005. Her articles have appeared at Trulia.com, SFGate.com, GardenGuides.com, RE/MAX.com, MarketLeader.com, RealEstate.com, USAToday.com and in "Chicago Agent" magazine, to name a few. She holds a Bachelor of Arts in English with a concentration in creative writing.